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1
Tužinský, L. "Soil moisture in mountain spruce stand." Journal of Forest Science 48, No. 1 (May 17, 2019): 27–37. http://dx.doi.org/10.17221/11854-jfs.
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Mountain forests are among the main components of natural environment in Slovakia. They grow mainly in areas with cold climate, on poor soils with unfavorable reaction, often very acidic (pH in H<sub>2</sub>O < 4.5) and with nutrient deficit. Immissions and acid rain attack forests to a great extent. Global climate changes also represent a new threat. Extremes in air temperatures, excessive amounts of precipitation or on the other hand the lack of water from precipitation, torrential rains or long-lasting drought periods are recorded as a result of a higher amount of heat energy accumulation from the greenhouse effect. Spruce forests are most endangered. Spruce with its root system concentrated in the upper soil layers, where also the highest amount of toxic elements accumulates, suffers more and more from dry and warm periods and it begins to wither due to drought. The occurrence of hydropedological cycles with a low or insufficient supply of available water in the soil is most frequent during summer (July, August). If the soil water potential values approach the value of the wilting point, an expressive decrease in transpiration is observed during the day, whereas its daily course is also suppressed. Gradual soil drying up from the upper layers towards the deepest ones of the physiological profile of soil represents a change in soil moisture stratification, especially after moistening the upper layers of soil with water from atmospheric precipitation. The deeper soil layers need not be re-saturated in such a case. Under drought the whole physiological profile of soil dries up in a relatively short time. Trees are exposed to a strong physiological stress in such conditions and after longlasting drought periods they can get into the state of total exhaustion.
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Yuge, Kozue, and Mitsumasa Anan. "Evaluation of the Effect of Wind Velocity and Soil Moisture Condition on Soil Erosion in Andosol Agricultural Fields (Model Experiment)." Water 11, no. 1 (January 8, 2019): 98. http://dx.doi.org/10.3390/w11010098.
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Soil erosion by the wind is an important phenomenon in drastic soil degradation. In Japan, andosol agricultural field is eroded by the wind and agricultural productivity is significantly affected. The aim of this study was to evaluate the effect of wind velocity and soil moisture condition on the soil erosion in andosol agricultural fields. Also, we determined the timing and amount of irrigation water needed to prevent soil erosion by the wind with respect to the wind and soil moisture conditions. A numerical model to simulate airflow in bare andosol field was developed using a continuity equation and Navier Stokes equations. Wind tunnel experiments which described a bare andosol field were performed to measure the degree of soil erosion for four levels of soil moisture condition and five wind velocities. Using the measured amount of soil transferred by wind, the erodibility parameter in Bagnold’s method that quantifies soil erosion was estimated inversely for four soil moisture values. The amounts of soil erosion calculated using this parameter were in good agreement with the measured amounts. These results indicate that the soil moisture and wind conditions under which soil erosion occurs can be determined and the amount of soil erosion can be predicted. Using these conditions and the erodibility parameter, the amount of irrigation needed for the prevention of soil erosion was quantified and the effect of irrigation on soil erosion was evaluated.
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Plett, S. "Corn kernel breakage as a function of grain moisture at harvest in a prairie environment." Canadian Journal of Plant Science 74, no. 3 (July 1, 1994): 543–44. http://dx.doi.org/10.4141/cjps94-097.
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The relationship between grain moisture at harvest and the amount of kernel cracking was evaluated at Brandon, Manitoba. Grain moisture at harvest was closely correlated to percentage kernel cracking. Least amount of kernel cracking occurred with grain moisture ranging from 16.7% for K730 to 22.1% for 3979. Key words: Maize, kernel breakage, grain moisture
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Li, Jun Xing, Ya Qiu Zhang, Wen Fu Wu, and Chun Shan Liu. "Study on the Effect of Salt Modulation upon the Maize Drying Process." Advanced Materials Research 430-432 (January 2012): 1412–16. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1412.
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A maize drying method of salt modulation is presented in this paper. Based on the thin-layer drying experiment [1], the effects of drying air temperature and salt amount on moisture removal rate is analyzed [2], and mathematical model equation is established on relationship between maize moisture ratio and drying time [3]. The experiment result shows that: a reasonable choice of the amount of salt, air temperature and other process parameters is useful to improve drying rate of maize. Salt modulated drying curve is exponentially. The more salt is added in, the faster the moisture removal rate. However, in the case of excessive salt, there may be a critical point of moisture change in the amount of salt until this point the faster the higher the salt amount, whereas the slower; if the critical changing point is higher than the safety moisture point, generally it will conductive to the maize moisture removal process.
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DEMIRHAN, E., G. SERT, S. H. HARMANLI, and B. ÖZBEK. "ESTIMATION OF TEA LEAVES MASS TRANSFER PARAMETERS UNDERGOING MICROWAVE HEAT TREATMENT." Latin American Applied Research - An international journal 48, no. 2 (March 30, 2018): 107–12. http://dx.doi.org/10.52292/j.laar.2018.267.
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In the present study, tea leaves (Camellia sinensis) were dried in the domestic microwave oven in order to determine the effect of microwave output power and sample amount on moisture ratio, drying time and effective moisture diffusivity. Five different microwave output power (180-900 W) and five different sample amount (20-100 g) values were used in the drying experiments. The drying data were fitted to some empirical and semi empirical models in order to determine the kinetic parameters. Among of the models proposed, the Page model gave a better fit for all drying conditions applied. The effective moisture diffusivity values were calculated by using the method of slopes at various microwave output powers and sample amounts. Moreover, the activation energy was calculated using an exponential expression based on Arrhenius equation.
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Wang, Meng, Ze Guang Lu, Wan Da Jia, Huai Yan Zhao, and Feng Shuang Wang. "Influence of Relative Humidity on the Moisture Evaporation of Monocomponent Water-Borne Sealer for Wooden Furniture under Forced Drying Condition." Key Engineering Materials 561 (July 2013): 341–46. http://dx.doi.org/10.4028/www.scientific.net/kem.561.341.
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The moisture evaporation amount and drying velocity of monocomponent sealer on the maple-veneered panels as base materials, under the drying conditions of constant temperature of 30°C and relative humidity varied from 30% to 70%, were measured in this study. The results indicated that the moisture evaporation amount increased, and drying velocity decreased with drying time under the same relative humidity, while the moisture evaporation amount decreased with the increase of relative humidity. The drying velocities were remarkable different under different relative humidities. During the same period of drying time, the difference degree of moisture evaporation amount within the relative humidity range of 30% to 50% was smaller than that within the relative humidity range of 50% to 70%.
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Moore, M., Z. Kuang, and P. N. Blossey. "A moisture budget perspective of the amount effect." Geophysical Research Letters 41, no. 4 (February 22, 2014): 1329–35. http://dx.doi.org/10.1002/2013gl058302.
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Xie, Hai Min, and Mao De Li. "Wet Transfer Effect on the Oxygen Content in the Underground Tunnel." Applied Mechanics and Materials 563 (May 2014): 229–32. http://dx.doi.org/10.4028/www.scientific.net/amm.563.229.
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In this article the research methods and theoretical models of moisture transfer in the porous medium material are reviewed and summarized. The optimal theoretical model of moisture transfer in the underground tunnel is found out. Through the comparison among different calculating methods of surface moisture content, the limestone material moisture equilibrium curve and the variation curve of time-dependent moisture transmission coefficient and the amount of moisture transfer are calculated. Based on all the statistics above, using the state equation of ideal gas, the variation trend of time-dependent oxygen content under the condition that the moisture transfer amount increased in the underground tunnel is gained, making ways and offering reference for further related research.
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Henneberg, Olga, Felix Ament, and Verena Grützun. "Assessing the uncertainty of soil moisture impacts on convective precipitation using a new ensemble approach." Atmospheric Chemistry and Physics 18, no. 9 (May 7, 2018): 6413–25. http://dx.doi.org/10.5194/acp-18-6413-2018.
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Abstract. Soil moisture amount and distribution control evapotranspiration and thus impact the occurrence of convective precipitation. Many recent model studies demonstrate that changes in initial soil moisture content result in modified convective precipitation. However, to quantify the resulting precipitation changes, the chaotic behavior of the atmospheric system needs to be considered. Slight changes in the simulation setup, such as the chosen model domain, also result in modifications to the simulated precipitation field. This causes an uncertainty due to stochastic variability, which can be large compared to effects caused by soil moisture variations. By shifting the model domain, we estimate the uncertainty of the model results. Our novel uncertainty estimate includes 10 simulations with shifted model boundaries and is compared to the effects on precipitation caused by variations in soil moisture amount and local distribution. With this approach, the influence of soil moisture amount and distribution on convective precipitation is quantified. Deviations in simulated precipitation can only be attributed to soil moisture impacts if the systematic effects of soil moisture modifications are larger than the inherent simulation uncertainty at the convection-resolving scale.We performed seven experiments with modified soil moisture amount or distribution to address the effect of soil moisture on precipitation. Each of the experiments consists of 10 ensemble members using the deep convection-resolving COSMO model with a grid spacing of 2.8 km. Only in experiments with very strong modification in soil moisture do precipitation changes exceed the model spread in amplitude, location or structure. These changes are caused by a 50 % soil moisture increase in either the whole or part of the model domain or by drying the whole model domain. Increasing or decreasing soil moisture both predominantly results in reduced precipitation rates. Replacing the soil moisture with realistic fields from different days has an insignificant influence on precipitation. The findings of this study underline the need for uncertainty estimates in soil moisture studies based on convection-resolving models.
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Lakshmi, Venkat. "Remote Sensing of Soil Moisture." ISRN Soil Science 2013 (March 7, 2013): 1–33. http://dx.doi.org/10.1155/2013/424178.
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Soil moisture is an important variable in land surface hydrology as it controls the amount of water that infiltrates into the soil and replenishes the water table versus the amount that contributes to surface runoff and to channel flow. However observations of soil moisture at a point scale are very sparse and observing networks are expensive to maintain. Satellite sensors can observe large areas but the spatial resolution of these is dependent on microwave frequency, antenna dimensions, and height above the earth’s surface. The higher the sensor, the lower the spatial resolution and at low elevations the spacecraft would use more fuel. Higher spatial resolution requires larger diameter antennas that in turn require more fuel to maintain in space. Given these competing issues most passive radiometers have spatial resolutions in 10s of kilometers that are too coarse for catchment hydrology applications. Most local applications require higher-spatial-resolution soil moisture data. Downscaling of the data requires ancillary data and model products, all of which are used here to develop high-spatial-resolution soil moisture for catchment applications in hydrology. In this paper the author will outline and explain the methodology for downscaling passive microwave estimation of soil moisture.
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Cheng, DingXin, Dallas N. Little, Robert L. Lytton, and James C. Holste. "Moisture Damage Evaluation of Asphalt Mixtures by Considering Both Moisture Diffusion and Repeated-Load Conditions." Transportation Research Record: Journal of the Transportation Research Board 1832, no. 1 (January 2003): 42–49. http://dx.doi.org/10.3141/1832-06.
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Two moisture damage models based on major moisture failure mechanisms are proposed. The adhesion failure model was developed to analyze the adhesive fracture between asphalt and aggregate in the presence of water. Cohesive and adhesive fractures in an asphalt-aggregate system are directly related to the surface energy characteristics of asphalt and aggregate. The surface energy of adhesion with or without the presence of water can be calculated from the surface energies of asphalt and aggregate. A moisture diffusion model was developed based on the one-dimensional consolidation of soil and a gas adsorption model. The moisture diffusion model was used to obtain the moisture diffusion characteristics of asphalt binders, including the amount of moisture that can permeate a binder and the diffusivity of the binder. The amount of moisture that permeates a binder is identified as a key factor in the moisture damage. Finally, mechanics-based experiments conducted on asphalt mixtures validated the results from the adhesion failure and diffusion models.
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Song, Hui Jun, and Ke Yong Tang. "Effects of Various Plasticizers on the Moisture Sorption and Mechanical Properties of Gelatin-Chitosan Composite Films." Advanced Materials Research 295-297 (July 2011): 1202–5. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1202.
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Effects of various types and amounts of plasticizer on the moisture sorption and mechanical properties of gelatin-chitosan composite films were investigated. The films were plasticized with glycerol, polyethylene glycol 400 (PEG 400), polyethylene glycol 800 (PEG 800), and sorbitol, respectively. With increasig the amount of plasticizers in the composite films plasticized with the fromer three plastizers, the equilibrium moisture sorption ratio increases. For the last one, however, it decreases with increasing the plastizers content. Increasing the plasticizer content decreases the tension strength and increases the elongation at break of the samples, and the type and amount of the plasticizers affect the mechanical properties of the composite films. PEG 400 is the most effective plasticizer in the plastizers studied.
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Sharif, RH, RK Paul, DK Bhattacharjya, and KU Ahmed. "Physicochemical characters of oilseeds from selected mustard genotypes." Journal of the Bangladesh Agricultural University 15, no. 1 (August 11, 2017): 27–40. http://dx.doi.org/10.3329/jbau.v15i1.33527.
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To evaluate the physicochemical characteristics of oilseeds, three varieties of mustard oilseeds were studied their seed weight, moisture, ash, carbohydrate, protein, fat, total energy and minerals composition of oil and cake. Among the varieties the highest thousand grain weight was found in BARI Sarisha-17 (4.24 g) and the lowest thousand grain weight was found in BARI Sarisha-15 (3.17 g). The highest moisture content was observed from BARI Sarisha-15 (4.52%); whereas the lowest moisture content was found in BARI Sarisha-17 (4.10%). The variety BARI Sarisha-17 contained significantly highest amount of oil (41.98%) whereas the variety BARI Sarisha-16 contained lowest amount of oil (40.95%). BARI Sarisha-16 contained highest amount of ash (14.20%). Significantly highest amount of protein was obtained from BARI Sarisha-15 (28.00%) and the lowest amount of protein obtained from BARI Sarisha-17 (22.57%). BARI Sarisha-17 contained highest amount of carbohydrate (18.85%), whereas BARI Sarisha-15 contained the lowest amount of carbohydrate (13.73%). BARI Sarisha-16 contained highest amount of Ca (2.52%) and Zn (66.80%). BARI Sarisha-15 contained highest amounts Cu (13.40%) and Fe (170.30%). Mustard varieties contained erucic acid (51.35-50.67%). Highest amount of total saturated fatty acid (TSFA) contained in BARI Sarisha- 15 (9.02%) and the lowest amount contained BARI Sarisha-16 (8.28%). Highest amount of total unsaturated fatty acid (TUSFA) contained in BARI Sarisha-17 (90.26%) lowest amount contained in BARI Sarisha-16 (87.04%). The highest amount of gross energy found from BARI Sarisha-15 (543.60 kcal/g; while lowest amount of gross energy recorded from BARI Sarisha-16 (531.20 kcal/g). Highest saponification value found in BARI Sarisha-17 (159.40) and lowest saponification value was found in BARI Sarisha-15 (157.6). The result of this research work confirms the mustard varieties seed to be of good quality and can be used for food preparation. The knowledge of this study could be utilized for various food preparation and selection for breeding purpose.J. Bangladesh Agril. Univ. 15(1): 27-40, January 2017
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Moniruzzaman, Mohammed, and John Rock. "Azobenzene-Based Gel Coated Fibre Bragg Grating Sensor for Moisture Measurement." International Journal of Polymer Science 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/8471903.
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A fibre Bragg grating sensor is coated with a novel polymer gel in order to investigate its suitability for nondestructive measurement of moisture in materials that can potentially lose their integrity due to moisture ingress. Absorption and desorption of moisture lead to swelling/shrinkage of an azobenzene-based gel, which induces a strain in the Bragg grating resulting in wavelength shifts. The results demonstrated that the amount of wavelength shift is linearly dependent on the amount of water ingress by the gel. The performance of the proposed optical fibre moisture sensor was found to be repeatable with no detectable hysteresis and has the potential to offer a low-cost route for monitoring moisture content.
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Nakamura, Tetsuya. "Estimating Amount of Watering of Greenhouse-grown Muskmelons." HortScience 31, no. 4 (August 1996): 669b—669. http://dx.doi.org/10.21273/hortsci.31.4.669b.
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In greenhouse-grown muskmelon (Cucumis melo L.) cultivation at Shizuoka Prefecture, Japan, growth, fruit enlargement, and translocation rates must be controlled by water content of plants through environment control. To produce high-quality muskmelons, growers have to control soil moisture appropriately through daily watering, but it has been difficult to estimate the suitable amount of water. Our study was performed to estimate watering using simple watering model. It is well known that evaporation and transpiration rates are in proportion to the differences between water vapor density of atmosphere and that of leaf and soil, respectively, and are inversely related to their resistances. Therefore, an amount of water to be watered was estimated from air temperature, soil temperature, relative humidity, solar radiation, and grower's experience. The evaporation and transpiration resistances were set up to make evapotranspiration close to amount of watering. First, to estimate amount of irrigation, the relationship between the grower's imaginary watering, which ignored neither yesterday's watering nor today's soil moisture, and today's weather index, which indicate today's evapotranspiration rate, was investigated. Secondly, the yesterday's estimated evapotranspiration and yesterday's amount of evapotranspiration rate were compared. From the comparison, soil moisture conditions before watering whether soil is wet or dry were estimated. Third, revised coefficient of watering was decided by grower. Finally, estimated amount of watering was obtained from the following things; today's weather index, comparison of the prediction and actual evapotranspiration, revised coefficient. As the result, anybody who had no special knowledge could manage the soil moisture by only observing today's weather like skilled growers.
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Hosseinian, Seyed Mohsen, Vahid Najafi Moghaddam Gilani, Peyman Mehraban Joobani, and Mahyar Arabani. "Investigation of Moisture Sensitivity and Conductivity Properties of Inductive Asphalt Mixtures Containing Steel Wool Fiber." Advances in Civil Engineering 2020 (October 30, 2020): 1–9. http://dx.doi.org/10.1155/2020/8890814.
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The construction of suitable roads in rainy areas has created problems in the construction process due to the low resistance of asphalt to moisture. To solve this problem, materials are commonly used that make mixtures resistant to moisture; however, these materials may reduce the dynamic resistance of asphalt. Therefore, materials should be used that, in addition to increasing the dynamic resistance, also increase the moisture resistance of asphalt mixtures. One of these materials used in this research is steel wool fiber (SWF), which in addition to creating conductive roads also could have a significant effect on moisture resistance. In this study, the impact of 2%, 4%, 6%, 8%, and 10% SWF on the Marshall stability and moisture sensitivity of mixtures was investigated using the Marshall stability and indirect tensile strength (ITS) tests, respectively. Moreover, using SWF as a conductive fiber, the conductivity properties of asphalt mixtures were explored to find the optimal amount of electrical conductivity. The results of the Marshall stability test indicated that by increasing SWF contents, the stability of mixtures increased, compared with the base sample, and greater amounts of 6% SWF resulted in the reduction of the Marshall stability. The results of ITS showed that modification of bitumen by SWF increased ITS and tensile strength ratio (TSR) amounts of mixtures. 6% SWF was the optimal amount for enhancing the resistance of asphalt mixtures to moisture sensitivity. The results of the electrical resistivity test showed that the resistivity had three phases: high resistivity, transit, and low resistivity. Mixtures containing less than 4% SWF illustrated an insulating behavior, with electrical resistivity greater than 7.62 × 108 Ω . m . At the transit phase, the resistivity of mixtures had a sharp reduction from 7.62 × 108 Ω . m to 6.17 × 104 Ω . m . Finally, 8% SWF was known as the optimal content for the electrical conductivity of mixtures.
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Kostenkova, E. V., and A. S. Bushnev. "INFLUENCE OF MOISTURE AVAILABILITY ON HELIANTHUS ANNUUS L. YIELD IN DRY CONDITIONS OF THE CRIMEAN PENINSULA." TAURIDA HERALD OF THE AGRARIAN SCIENCES 4 (24) (November 2020): 81–89. http://dx.doi.org/10.33952/2542-0720-2020-4-24-81-89.
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The Crimean Peninsula is located in the dry zone. In the steppe Crimea, which is the driest part of the peninsula, the major limiting factor for crop productivity is the natural moisture supply of plants. The purpose of the research was to establish the relationships between hydrometeorological factors (moisture reserves in the soil before sowing, precipitation amount and Selyaninov hydrothermal coefficient during the growing season) and sunflower yield depending on planting dates (I, II, III decade of April) and plant density (30, 40, 50, 60, 70 thousand units per hectare). The studies were carried out on the trial fields of the Research Institute of Agriculture of Crimea (village of Klepinino) in 2017–2019 using hybrid of ultra-early sunflower ‘Avangard’. The laying of field experiments, accounting, analyzes and statistical processing of data were carried out according to the methods of field research and methodology of field agricultural experiments with oil crops. A strong correlation was observed: 1) between yield and precipitation amount in May (r = 0.977) and moisture reserves before sowing (r = 0.978), planting dates – the first decade of April; 2) between precipitation amount in May (r = 0.932) and moisture reserves before sowing (r = 0.977–0.978), sunflower was sown in the second decade of April; 3) moisture before sowing (r = 0.892), crop planted in the third decade of April. A close positive relationship (r = 0.853–0.972) was observed at the optimal plant density for the region (40 thousand units/ha) between the amount of precipitation in April–May, moisture reserves in the soil before sowing and yield of sunflower. This indicates a high value of moisture availability during this period in the crop yield formation. In denser crops (50–70 thousand units/ha), the closest relationship is observed between the yield and the amount of precipitation in May. This makes the latter primary and decisive in the cultivation of crops with such a density since the competition for moisture increases with an increase in the number of plants per unit area. The closest relationship between the Selyaninov hydrothermal coefficient and sunflower yield was observed in April and May (r = 0.833–0.967) when plants grow more intensively and require sufficient moisture.
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Cann, Matthew D., and K. Friedrich. "The Role of Moisture Pathways on Snowfall Amount and Distribution in the Payette Mountains of Idaho." Monthly Weather Review 148, no. 5 (April 17, 2020): 2033–48. http://dx.doi.org/10.1175/mwr-d-19-0350.1.
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Abstract The pathways air travels from the Pacific Ocean to the Intermountain West of the United States are important for understanding how air characteristics change and how this translates to the amount and distribution of snowfall. Recent studies have identified the most common moisture pathways in the Intermountain West, especially for heavy precipitation events. However, the role of moisture pathways on snowfall amount and distribution in specific regions remains unclear. Here, we investigate 24 precipitation events in the Payette Mountains of Idaho during January–March 2017 to understand how local atmospheric conditions are tied to three moisture pathways and how it impacts snowfall amount and distribution. During one pathway, southwesterly, moist, tropical air is directed into the Central Valley of California where the air is blocked by the Sierra Nevada, redirected northward and over lower terrain north of Lake Tahoe into the Snake River Plain of Idaho. Other pathways consist of unblocked flows that approach the coast of California from the southwest and then override the northern Sierra Nevada and southern Cascades, and zonal flows approaching the coast of Oregon overriding the Oregon Cascades. Air masses in the Payette Mountains of Idaho associated with Sierra-blocked flow were observed to be warmer, moister, and windier compared to the other moisture pathways. During Sierra-blocked flow, higher snowfall rates, in terms of mean reflectivity, were observed more uniformly distributed throughout the region compared to the other flows, which observed lower snowfall rates that were predominantly collocated with areas of higher terrain. Of the total estimated snowfall captured in this study, 67% was observed during Sierra-blocked flow.
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Sanders, Douglas C., Jennifer D. Cure, Pamela M. Deyton, and Randolph G. Gardner. "Assessing Vascularization Response of Three Tomato (Lycopersicon esculentum Mill.) Cultivars to Soil Type, Nutrient Stress, and Water Stress." HortTechnology 6, no. 4 (October 1996): 405–8. http://dx.doi.org/10.21273/horttech.6.4.405.
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Amount of vascular development (veininess) is an important quality factor for processing wholepack tomatoes. The influences of nutrient and soil moisture stress on the amount of vascular development in `Chico III', `Dorchester', and `Roma' tomato fruit were studied. Fruit subjected to nutrient stress showed the highest amount of veininess. Fruit exposed to moisture stress after initial fruit set did not differ from controls in amount of veininess. Amount of vascularization did not differ among cultivars. A method for quantifying veininess was developed and compared with a traditional subjective rating scale. There was a high correlation (r2 = 0.77) between the subjective rating and quantitative measurement of veininess.
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Butts, C. L. "Correcting Current Moisture Calculations for Purchasing High Moisture Farmers Stock Peanuts1." Peanut Science 25, no. 2 (July 1, 1998): 114–19. http://dx.doi.org/10.3146/i0095-3679-25-2-11.
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Abstract The U.S. peanut industry may eliminate the 10% moisture content threshold for purchasing peanuts to facilitate implementing continuous flow drying systems and to increase the efficiency of the postharvest processing system. Equations based on the theoretical definition of wet basis moisture content were proposed to determine the weight of various components in a load of farmers stock peanuts. These equations more accurately describe and account for the distribution of moisture within a load of peanuts. Accurate descriptions of the amount of loose shelled kernels, foreign material, and in-shell peanuts would enable improved tracking of losses during storage. Compared to the current price structure, the proposed equations predict reduced payments to growers no more than $30 per 5-mt load of peanuts. The maximum reduction of $30 occurred if peanuts were delivered and marketed at 30% w.b. moisture content. A reduction of approximately $8.50 would occur for a 5-mt load delivered at 15% moisture content. The cumulative economic impact warrants adjustment of the peanut support price schedule if accurate accounting of moisture is implemented.
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Murányi, Eszter. "Effect of sowing technology on the yield and harvest grain moisture content of maize (Zea mays L.) hybrids with different genotypes." Acta Agraria Debreceniensis, no. 68 (February 18, 2016): 17–22. http://dx.doi.org/10.34101/actaagrar/68/1764.
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From the aspect of the efficiency of maize production harvest grain moisture content shall be considered beside the amount of harvested grain yield. Hybrids with different genotypes and vegetation period length lose their moisture content different that is affected by row spacing and plant density – among agrotechnical production factors – depending on the given crop year. In the present research work three crop years with different weather conditions were studied (2013, 2014, and 2015). The small-plot field experiment was set up at the Látókép Field Research Centre of the University of Debrecen, Centre for Agricultural Sciences with four replications on a chernozem soil type. The effect of three factors was analysed in the experiment on yield amount and its moisture content. Factors were row spacing (45 and 76 cm), plant density (50, 70 and 90 thousand plants ha-1), while hybrids were of very early (Sarolta: FAO 290), early (DKC 4014: FAO 320, P 9175: FAO 330, P 9494: FAO 390) and medium (SY Afinity: FAO 470) ripening.
In the crop year of 2013 the highest yield was produced – regarding the average of the hybrids – by the application of a row spacing of 45 cm (4.5%, 673 kg ha-1), however there was no significant difference between the yield of the populations of different row spacings. Significant difference (14.9%, 1751 kg ha-1; 6.3%, 583 kg ha-1) could be found in case of yield between different row spacing applications in 2014 and 2015. The effect of insufficiently distributed low amount of precipitation and lasting heat days in 2015 could be revealed in yield amounts and harvest grain yield moisture content results that were lower than in the previous years. In 2015 grain yield moisture content varied between 10.3 and 13.9% in case of a row spacing of 45 cm, while by 76 cm between 11.0 and 13.9%.
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Zhang, Hui, Tiehang Wang, Enlong Liu, and Mengling Hu. "Experimental Study on Moisture Migration of Unsaturated Loess during the Freezing Process." Advances in Civil Engineering 2020 (September 7, 2020): 1–11. http://dx.doi.org/10.1155/2020/5272070.
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To reveal the water-heat transfer mechanism of unsaturated loess, the effects of soil dry density (1.30 g/cm3, 1.50 g/cm3, and 1.65 g/cm3), moisture content (13.3%, 16.2%, and 19.4%), cold end temperature (−7°C, −10°C, and −13°C), and freezing mode on moisture migration in unsaturated loess in this paper are studied through indoor tests of moisture migration under the freezing action of large-size unsaturated loess. The results show that the temperature change in soil samples in the freezing process can be divided into three stages: rapid cooling stage, slow cooling stage, and stable stage. The higher the dry density, the closer the freezing front is to the cold end, with the initial moisture content having little effect on the freezing front, while the temperature at the cold end has a significant effect on the location of the freezing front. The total amount of moisture migration decreases with the increase of dry density, increases with the increase of moisture content, and increases with the decrease of cold end temperature. The freezing mode directly affects the distribution of moisture content and total amount of moisture migration in the frozen area.
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Wang, Tie Hang, Hui Zhang, and Xing She Lu. "Experimental Study on Moisture Migration in Unsaturated Loess under Freezing Effect." Applied Mechanics and Materials 204-208 (October 2012): 552–56. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.552.
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Test equipments were designed and manufactured for producing moisture migration in unsaturated loess under freezing effect. The results showed that both the amount of freezing-thawing cycles and initial water content of soil samples affect the process of moisture migration. As the freezing front advanced in the sample, the water content in the unfrozen part significantly reduced and the water content in the freezing part significantly increased, with the maximum water content at the freezing front. Comparing to the moisture migration in the unfrozen part, the moisture migration to the freezing front in the freezing part was relatively slow. For soil samples with higher initial water content, the increment of water content at the freezing front was higher and sometimes ice could be formed. During a certain amount of freezing-thawing cycles, the water content at the freezing front kept increasing. However, as the amount of freezing-thawing cycles continued increasing, the freezing front started to move to the part with negative temperature and the maximum water content appears at the end with the lowest temperature.
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Ishii, H., K. Tanaka, M. Aoki, T. Murakami, and M. Yamada. "Sewage Sludge Composting Process by Static Pile Method." Water Science and Technology 23, no. 10-12 (May 1, 1991): 1979–89. http://dx.doi.org/10.2166/wst.1991.0654.
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This paper reports the results of experiments on the static pile composting process undertaken in different conditions. The experiments have revealed the following:–In order to compost dewatered sludge with polymer without any bulking agents, we used recycled compost to adjust the moisture content of dewatered sludge.When the moisture content of feed mixture, which was dewatered sludges and recycled composts, was lowered to approximately 50%, the raw sludge could be composted by either natural ventilation or intermittent aeration.–When the BOD of feed mixture was lower than 50 g/kg-DS, the fermentation temperature did not reach 60°C and the moisture content of the mixture was not lowered during composting period.–The required composting time was approximately 50 days for natural ventilation (at an average temperature of 10°C or 24°C) and approximately 35 days for intermittent aeration (at an average temperature of 10°C to 24°C), when the moisture content and the BOD of finished compost was 40% or less and 30 g/kg-DS or less, respectively.–There was a highly positive correlation between the amount of water evaporated and the amount of BOD removed. This result suggested that the amount of water evaporation could be deduced from the amount of BOD removed.
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Hatch, Kathryn L., Harriet H. Prato, S. Haig Zeronian, and Howard I. Maibach. "In Vivo Cutaneous and Perceived Comfort Response to Fabric: Part VI: The Effect of Moist Fabrics on Stratum Corneum Hydration." Textile Research Journal 67, no. 12 (December 1997): 926–31. http://dx.doi.org/10.1177/004051759706701209.
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Materials placed over human skin may change the stratum corneum (sc) hydration level, an important phenomenon because increases in normal levels of sc hydration pose potential health problems. This study examines the relationship between fabric moisture content and level of sc hydration so that the role of fabric moisture on sc hydration may be better understood. Three fabric/moisture treatments are placed on the sc—3.5-denier polyester fabric with an initial moisture content of 35% and cotton fabrics with either 44% or 75% initial moisture content—then covered with an occlusive dome. sc evaporative water loss (ewl) is measured before treatment placement and after 30 and 60 minutes of contact. The amount of moisture in the fabric at time of removal is calculated two different ways, and three analyses of variance are done using the evaporative water loss and two fabric final moisture content data sets. The rate of ewl is significantly higher after 30 minutes of treatment contact with sc than after 60 minutes of contact. The amount of moisture in the fabrics is significantly less at time 60 than at time 30, implying that the sc is more hydrated at 30 minutes than at 60 minutes. However, the fabrics contain less moisture when removed at 60 minutes than at 30 minutes. As fabric moisture content decreases, sc hydration decreases. The question we are not able to answer is “Where does the moisture go that is initially in the fabric?’
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Sigua, Gilbert C., Allan R. Isensee, and Alim Sadeghi. "Influence of Tillage, Antecedent Moisture, and Rainfall Timing on Atrazine Transport." Weed Science 43, no. 1 (March 1995): 134–39. http://dx.doi.org/10.1017/s0043174500080942.
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Laboratory studies were conducted to determine the effect of rainfall timing and antecedent moisture on atrazine leaching through intact soil cores taken from no-till and conventional-till corn fields. Simulated rainfall was applied to no-till and conventional-till cores 1 to 14 d after atrazine application and, in a second study, one d after atrazine was applied to no-till and conventional-till cores at 1 to 800 kPa soil moisture. Increasing the lag time between atrazine application and rainfall from one to 14 d reduced the amount of atrazine leached by about 50% for both no-till and conventional-till soil cores. During the same time period, the amount of atrazine adsorbed to soil increased by about 30% for both tillages. Soil dryness (antecedent moisture) at the time of atrazine application had no effect on the amount of atrazine leached through conventional-till cores. However, leaching decreased in no-till cores as antecedent moisture decreased from 1 to 33 kPa; drying to 800 kPa had no further effect. The leaching rate of atrazine was much higher for the initial 0.5 pore volume than for the next 1.5 pore volume at all rainfall timing and antecedent moisture levels. This behavior is indicative of preferential transport.
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Tsang, K. R., and P. A. Vesilind. "Moisture Distribution in Sludges." Water Science and Technology 22, no. 12 (December 1, 1990): 135–42. http://dx.doi.org/10.2166/wst.1990.0108.
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By studying the drying characteristic curve, the moisture in sludge is classified into four categories: free moisture, interstitial moisture, surface moisture and bound moisture. The effects of three dewatering procedures: gravity drainage, vacuum filtration, and centri-fugation, as well as chemical conditioning by a cationic polymer, and physical conditioning by freeze-thaw on the moisture distribution, are investigated. It is found that the dewatering procedures studied can only remove part of the free and interstitial moisture; surface and bound moisture are not affected. Part of the free and interstitial moisture also remains with the sludge cake, which can be considered as the inherent inefficiency of the dewatering process. The complete removal of all the free moisture can be considered as the theoretical best performance any mechanical dewatering device can achieve. Polymer addition is found to improve the dewaterability of the sludge by reducing the inherent inefficiency, primarily by reducing the amount of free moisture retained in the cake. Freeze-thaw is found to effect the removal of free, interstitial and surface moisture, bringing about a dramatic increase in dewaterability. The treated sludge cake drains readily and retains no free moisture.
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Liu, Yinghui, Jeffrey R. Key, Steve Vavrus, and Cian Woods. "Time Evolution of the Cloud Response to Moisture Intrusions into the Arctic during Winter." Journal of Climate 31, no. 22 (November 2, 2018): 9389–405. http://dx.doi.org/10.1175/jcli-d-17-0896.1.
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Abstract Northward fluxes of moisture and sensible heat into the Arctic affect the atmospheric stability, sea ice and snow cover, clouds, and surface energy budget. Intense moisture fluxes into the Arctic are called moisture intrusions; some can lead to basinwide increases in downward longwave radiation (DLR) at the surface, called downward infrared (IR) events. Using the ERA-Interim reanalysis from 1990 to 2016, this study investigated the time evolution of cloud amount and cloud properties and their impact on the surface radiation fluxes in response to Arctic moisture intrusions and downward IR events during winter for better understanding of the Arctic moisture intrusions. A composite analysis revealed several key features: moisture intrusions produce more clouds and higher cloud liquid and ice water content; positive cloud amount anomalies can persist for over 10 days over the Arctic Ocean during downward IR events; positive high-level and middle-level cloud anomalies are evident in the early stage, and positive low-level cloud anomalies are evident in the late stage. Greater clear-sky DLR and longwave cloud radiative forcing (CRF) over the Arctic Ocean accompany the greater all-sky DLR during the downward IR events. Greater clear-sky DLR can be attributed to higher air temperatures and higher total column water vapor, while greater longwave CRF is the result of larger cloud amount and cloud water content. Longwave CRF anomalies account for approximately 40% of the all-sky DLR anomalies.
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Mälicke, Mirko, Sibylle K. Hassler, Theresa Blume, Markus Weiler, and Erwin Zehe. "Soil moisture: variable in space but redundant in time." Hydrology and Earth System Sciences 24, no. 5 (May 25, 2020): 2633–53. http://dx.doi.org/10.5194/hess-24-2633-2020.
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Abstract. Soil moisture at the catchment scale exhibits a huge spatial variability. This suggests that even a large amount of observation points would not be able to capture soil moisture variability. We present a measure to capture the spatial dissimilarity and its change over time. Statistical dispersion among observation points is related to their distance to describe spatial patterns. We analyzed the temporal evolution and emergence of these patterns and used the mean shift clustering algorithm to identify and analyze clusters. We found that soil moisture observations from the 19.4 km2 Colpach catchment in Luxembourg cluster in two fundamentally different states. On the one hand, we found rainfall-driven data clusters, usually characterized by strong relationships between dispersion and distance. Their spatial extent roughly matches the average hillslope length in the study area of about 500 m. On the other hand, we found clusters covering the vegetation period. In drying and then dry soil conditions there is no particular spatial dependence in soil moisture patterns, and the values are highly similar beyond hillslope scale. By combining uncertainty propagation with information theory, we were able to calculate the information content of spatial similarity with respect to measurement uncertainty (when are patterns different outside of uncertainty margins?). We were able to prove that the spatial information contained in soil moisture observations is highly redundant (differences in spatial patterns over time are within the error margins). Thus, they can be compressed (all cluster members can be substituted by one representative member) to only a fragment of the original data volume without significant information loss. Our most interesting finding is that even a few soil moisture time series bear a considerable amount of information about dynamic changes in soil moisture. We argue that distributed soil moisture sampling reflects an organized catchment state, where soil moisture variability is not random. Thus, only a small amount of observation points is necessary to capture soil moisture dynamics.
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Alipour, Nazanin, Björn Vinnerås, Fabrice Gouanvé, Eliane Espuche, and Mikael S. Hedenqvist. "A Protein-Based Material from a New Approach Using Whole Defatted Larvae, and Its Interaction with Moisture." Polymers 11, no. 2 (February 8, 2019): 287. http://dx.doi.org/10.3390/polym11020287.
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A protein-based material created from a new approach using whole defatted larvae of the Black Soldier fly is presented. The larvae turn organic waste into their own biomass with high content of protein and lipids, which can be used as animal feed or for material production. After removing the larva lipid and adding a plasticizer, the ground material was compression molded into plates/films. The lipid, rich in saturated fatty acids, can be used in applications such as lubricants. The amino acids present in the greatest amounts were the essential amino acids aspartic acid/asparagine and glutamic acid/glutamine. Infrared spectroscopy revealed that the protein material had a high amount of strongly hydrogen-bonded β-sheets, indicative of a highly aggregated protein. To assess the moisture–protein material interactions, the moisture uptake was investigated. The moisture uptake followed a BET type III moisture sorption isotherm, which could be fitted to the Guggenheim, Anderson and de Boer (GAB) equation. GAB, in combination with cluster size analysis, revealed that the water clustered in the material already at a low moisture content and the cluster increased in size with increasing relative humidity. The clustering also led to a peak in moisture diffusivity at an intermediate moisture uptake.
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Zhou, Qiuwen, Zhiyan Sun, Xiaolin Liu, Xiaocha Wei, Zheng Peng, Caiwen Yue, and Yaxue Luo. "Temporal Soil Moisture Variations in Different Vegetation Cover Types in Karst Areas of Southwest China: A Plot Scale Case Study." Water 11, no. 7 (July 11, 2019): 1423. http://dx.doi.org/10.3390/w11071423.
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For different vegetation types, soil moisture content shows varying characteristics in different seasons and under different precipitation conditions. However, these characteristics have not been extensively analyzed in karst regions of southwest China. In this study, the soil moisture content of four plots of bare land, grassland, shrubland, and forestland was monitored, and the soil moisture content and corresponding meteorological data for each plot were analyzed. The results indicate that the average soil moisture content in grassland was the highest with weak temporal variation and that in bare, shrub, and forest lands soil moisture content was low with moderate temporal variation. The average soil moisture content in bare, grass, and forest lands was higher in the rainy season than in the dry season, whereas in shrubland, the soil moisture content was higher in the dry season than in the rainy season. Increase in soil moisture content during each precipitation event correlated with the rainfall amount. With increasing rainfall amount, soil moisture content in forest and shrub lands increased more than in bare and grass lands. The peak soil moisture time in each vegetation type plot varied and the peak soil moisture time was related to soil moisture content before a rainfall event. Temperature showed a strong negative correlation with soil moisture content for all vegetation cover types in both the dry and rainy season. Wind speed also showed a strong negative correlation with soil moisture content for all vegetation types during the dry season. Relative humidity had a strong positive correlation with soil moisture content in bare, shrub, and forest lands during the dry season as well as in the four vegetation types during the rainy season. These results demonstrate the variations in soil water characteristics across different vegetation types in karst regions of southwest China.
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Sun, Xiao Fei, and Yu Hui Qiao. "Effect of Ginkgo Protein on Moisture Content and Hardness of Bread." Advanced Materials Research 531 (June 2012): 395–98. http://dx.doi.org/10.4028/www.scientific.net/amr.531.395.
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Ginkgo seeds were selected and used as experimental material to study protein compositions in ginkgo protein. Ginkgo protein was used as accessory to be added into flour to make bread. Effect of ginkgo protein on moisture content and hardness of bread were investigated. Experimental results showed that ginkgo protein contained water-soluble protein and salt-soluble protein which was 85.28 percents in total protein and contained small amounts of prolamin and alkali-soluble protein. The bread added with different ratios of ginkgo protein had higher moisture content and lower hardness. Therefore, adding appropriate amount of ginkgo protein could improve bread baking performances and bread shelf life.
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Taverna, Lívia Giolo, Magali Leonel, and Martha Maria Mischan. "Changes in physical properties of extruded sour cassava starch and quinoa flour blend snacks." Food Science and Technology 32, no. 4 (October 16, 2012): 826–34. http://dx.doi.org/10.1590/s0101-20612012005000113.
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Given the broad acceptance of sour cassava starch biscuits in Brazil and the nutritional quality of quinoa flour, this study aimed to evaluate the effect of extrusion temperature, screw speed, moisture, and amount of quinoa flour on the physical properties of puffed snacks. Extrusion process was carried out using a single-screw extruder in a factorial central composite design with four factors. Effects of moisture and amount of quinoa flour on the expansion index and specific volume of snacks were observed. There was a pronounced increase in water solubility index of blends with the extrusion process with significant effects of all process parameters on the WSI. Higher water absorption index (WAI) was observed under high temperature, low moisture, and lower quinoa flour amount. Temperature and amount of quinoa flour influenced the color of the snacks. A positive quadratic effect of quinoa flour on hardness of products was observed. Blends of sour cassava starch and quinoa flour have good potential for use as raw material in production of extruded snacks with good physical properties.
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Dhillon, S. K., and K. S. Dhillon. "Pools of selenium in some Indian soils at field capacity and submerged moisture regimes." Soil Research 42, no. 2 (2004): 247. http://dx.doi.org/10.1071/sr03002.
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Pools of soil selenium (Se) as influenced by moisture regimes were investigated in some normal and seleniferous (which produce vegetation containing >5 mg Se/kg—the maximum permissible level for animal consumption) soils of India. Soil samples were equilibrated with 75Se by subjecting to alternate wetting and drying cycles and incubated at field capacity and submerged moisture regimes. Each soil sample was subjected to either single extraction with 0.25 M KCl, 0.1 M KH2PO4, and 4 M HCl in a sequence or 7 extractions with KCl followed by 7 extractions with KH2PO4 and 2 with HCl. Amount of 75Se extracted from different soils incubated at field capacity through single extraction with 0.25 M KCl varied from 8.4 to 30.5% of applied 75Se for alkaline and 2.6 to 10.4% for acidic soils. Among alkaline soils, a greater amount of 75Se was extracted from highly calcareous non-seleniferous soils than seleniferous soils. The amount of selenium extracted through 7 sequential extractions with 0.25 M KCl was 1.5–7.0 times greater than that extracted through single extraction. A significant coefficient of correlation between 75Se extracted through repeated extractions with 0.25 M KCl and pH of the soils (r = 0.93, P�≤ 0.01) suggested greater availability of Se in alkaline than acidic soils. Specifically sorbed soil Se extracted with 0.1 M KH2PO4 through 7 sequential extractions ranged from 15.3 to 24.6% for alkaline and 24.4 to 40.1% for acidic soils. The amount of 75Se desorbed through multiple extractions with 4 M HCl was negatively correlated with pH (r�= –0.95, P ≤ 0.01) and electrical conductivity (r = –0.85, P ≤ 0.05) of the soils. After subjecting to single extraction, residual 75Se left in soils incubated at field capacity moisture varied from 11.7 to 59.7%. It was negatively correlated with pH (r = –0.85, P ≤ 0.05) and CaCO3 (r = –0.79, P ≤ 0.10) and positively correlated with ammonium oxalate extractable iron content (r = 0.76, P ≤ 0.10) of soils. Compared with the single extraction procedure, only a small amount (9–36%) of 75Se was left as residual 75Se after multiple extractions. Relatively less 75Se was released when the alkaline or acidic soils incubated under submergence were subjected to single or multiple extraction procedures. The multiple extraction procedure could better assess different soil Se pools than the single extraction procedure. At field capacity moisture, large amounts of Se occur in easily available forms. Under submerged conditions, substantial amounts of Se are maintained in the soil solution when Se is removed from the solution through plant uptake or leaching.
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Maklyukov, V. I., E. O. Gerasimova, N. V. Labutina, and E. N. Rogozkin. "Analysis of electro- and thermophysical processes occurring during electrocontact baking of flour products." Khleboproducty 29, no. 11 (2020): 50–55. http://dx.doi.org/10.32462/0235-2508-2020-29-11-50-55.
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The article considers the results of research conducted during electric contact heating of rye-wheat dough pieces. It is established that the electrical conductivity of the crumb dough does not depend on the total humidity of the material, but mainly on the amount of free moisture. Using the current and temperature graphs, you can imagine how free moisture changes during the baking process and the influence of the thermophysical and colloidal process on the change in the value of free moisture. Experimentally determined the amount of heat that is spent on baking 1 kg of bread. The accuracy of the theoretical calculation of this parameter in the heat balance of the baking chamber is confirmed.
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Zhang, Chun Xiao, Fu Chen Bai, Xi Yao Zhang, Jian Liu, and Wan Xi Zhang. "Study on the Moisture Absorption Properties of Poly[acrylate-co-methacrylate]." Materials Science Forum 610-613 (January 2009): 81–84. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.81.
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Moisture-absorbent poly- (acrylate-co-methacrylate) was synthesized by solution polymerization, using N,N’-methylene bisacrylamide as the crossinglinking agent, sodium bisulfate and ammonium persulfate as the initiator. The moisture absorption properties of the copolymer in different temperatures and humidities have been systematically studied. Experimental results indicated that the moisture absorption behavior has been enhanced with the increase amount of methacrylate. Under different relative humidity, the moisture adsorption ability was distinct. When the relative moisture reached 40%, the humidity behavior became less evident. As the increase of moisture, the absorbency for moisture improves correspondingly. When the relative moisture get to 90%, the properties of this copolymer was obviously improved compared with the traditional materials, such as silica gel and molecular sieve.
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Brambora, Karel, and Eva Burgetová. "The Influence of Rainfall Humidity on the Moisture Regime of Envelope Structures with Internal Insulation." Key Engineering Materials 731 (March 2017): 49–54. http://dx.doi.org/10.4028/www.scientific.net/kem.731.49.
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While the matters of the moisture of external walls of historical buildings it turned out that apart from classical sources of moisture (such as capillary attraction, condensation etc.) there is another source which is often left behind – rainfall humidity which leaks to perimeter walls from the exterior. Whilst the Czech approach of standard assessment works with condensed moisture only, some foreign authors (especially those from Germany) point out a notable influence of rainfall humidity on the moisture regime of the mentioned constructions. Its amount exceeds the amount of rainfall that leaks into the construction due to diffusion by several times. The issue deserves to be examined in more detail, but the use of nanotechnology could help to solve or improve the problem. In some cases it would be possible to apply the suspension with added nanoparticles into the insulated masonry and improve the properties of masonry, which is facing to rainwater
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Naryanto, Rizqi Fitri, Hiroshi Enomoto, Anh Vo Cong, Kazuki Fukadu, Zheng Zong, Mera Kartika Delimayanti, Chuntima Chunti, and Reiji Noda. "The Effect of Moisture Content on the Tar Characteristic of Wood Pellet Feedstock in a Downdraft Gasifier." Applied Sciences 10, no. 8 (April 16, 2020): 2760. http://dx.doi.org/10.3390/app10082760.
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This study examined the tar characteristic of wood pellet using a downdraft gasifier system. The wood pellet was used as a feedstock with a variation of moisture content between 2 to 6 wt. %. Tar sample was taken using the JP 2009-40885 method. Gas chromatography mass spectrometry and gravimetric analysis were used to identify and to analyze the tar sample, respectively. The results show that an increase in moisture content slightly decreased the total concentration of tar formation on the nine tar compounds of the biomass. Additionally, the lowest moisture content produced the highest amount of light tar on tar classification. The amount of light tar indicates the ease of ignition in the gasifier. Therefore, this condition will minimize the failure-of-equipment problem because of no clogs in the gasifier equipment. The lowest moisture content had the lowest tar density, and this minimized the deposit of tar in the gasifier. Therefore, the lowest moisture content had low tar production in the biomass gasification process using wood pellets.
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Lee, Keun-Ok, Cyrille Flamant, Fanny Duffourg, Véronique Ducrocq, and Jean-Pierre Chaboureau. "Impact of upstream moisture structure on a back-building convective precipitation system in south-eastern France during HyMeX IOP13." Atmospheric Chemistry and Physics 18, no. 23 (November 29, 2018): 16845–62. http://dx.doi.org/10.5194/acp-18-16845-2018.
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Abstract. The present study examines the impact of the environmental moisture structure in the lower troposphere (below 2 km above sea level, a.s.l.) on the precipitation development, observed in southern France during Intensive Observation Period (IOP) 13 of the first Special Observation Period of the Hydrological cycle in the Mediterranean Experiment (HyMeX SOP-1), through a series of sensitivity experiments using the non-hydrostatic mesoscale atmospheric numerical model (Meso-NH). The control simulation (CNTL) and all the other 12 sensitivity experiments examined in this study succeed in reproducing a heavy precipitation event (HPE) in the coastal mountainous region of Var in south-eastern France as observed. The sensitivity experiments are designed to investigate the response of the HPE to the variability of the water vapour content upstream in the moist marine atmospheric boundary layer (MABL) and the drier air above. The comparisons between CNTL and the 12 sensitivity experiments show how the life cycle of precipitation associated with the HPE, but also the upstream flow (over the sea), is modified, even for moisture content changes of only 1 g kg−1 below 2 km a.s.l. Within the low-level wind convergence between southerlies and south-westerlies, a small increase of moisture content in the MABL prolongs moderate precipitation (≥5 mm in 15 min) and enlarges the area of weak precipitation (≥1 mm in 15 min). The moistening in the 1–2 km a.s.l. layer, just above the MABL, prolongs the duration of moderate precipitation, for a similar total precipitation amount as in CNTL. The drier MABL and 1–2 km a.s.l. layer shorten the lifetime of precipitation and reduce the total precipitation amount with respect to CNTL. We also found that the moisture in the MABL has a stronger impact on producing enhanced precipitation (both in terms of amount and intensity) than the moisture just above (1–2 km a.s.l.). Also, it is worth noting that adding moisture in the MABL does not necessarily lead to enhanced precipitation amount. In moistening the MABL, the duration of moderate precipitation increases with increasing moisture as does the area covered by weak precipitation, while the area covered by the intense precipitation (≥30 mm) decreases. Despite a simplified moisture-profile modification approach, this study suggests that moisture structure in the lower troposphere is key for accurate prediction at short-term range of the timing and location of precipitation in the coastal mountainous region in southern France.
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Tuyogon, Ruel, Ireneo Amplayo, and Ryan Abenoja. "Application of Absorbent Polymer in Improving Moisture Retention and Growth Performance of 'Lakatan' Banana (Musa sapientum L.) under Nursery Condition." Southeastern Philippines Journal of Research and Development 25, no. 1 (March 31, 2020): 17–31. http://dx.doi.org/10.53899/spjrd.v25i1.69.
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Absorbent polymers allow the soil to retain a substantial amount of moisture. This property plays a vital role in producing banana plantlets to mitigate the adverse condition of the climate. This study determines the effect of absorbent polymers in improving moisture retention in the soil and on the growth response of ‘lakatan’ banana plantlets under nursery conditions. Three factors were used in determining the effect: irrigation amount, irrigation frequency, and amount of polymer. The data was analyzed using Analysis of Variance (ANOVA) with a 3x3x2 factorial experiment in split-split plot design arranged in Randomized Complete Block Design (RCBD). The results of the study indicated that the interaction of the three factors had a significant effect on the morphological characteristics of the banana plantlets. The irrigation frequency and the amount of polymer significantly affected the average plant height and leaf area increment of the banana plantlets. However, the girth size was only affected by the amount of irrigation and polymer. Moisture retention was observed in the soils treated with the absorbent polymer. Partial budget analysis revealed that a benefit-cost ratio of 2.33 was obtained using twice a week irrigation frequency with a 15 mm volume of application.
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Latimer, Joyce G., and Ray F. Severson. "Effect of Mechanical and Moisture-stress Conditioning on Growth and Cuticle Composition of Broccoli Transplants." Journal of the American Society for Horticultural Science 122, no. 6 (November 1997): 788–91. http://dx.doi.org/10.21273/jashs.122.6.788.
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Epicuticular waxes were analyzed to explain the visible differences in the waxy bloom of conditioned broccoli (Brassica oleracea L. Group Italica `Green Duke') transplants. Seedlings (22 days old) were subjected to brushing (40 cycles per minute, 1 minute twice daily), wind (7 m·s-1 for 5 minutes twice daily), or moisture-stress conditioning (MSC; visible wilt for 2 to 4 hours daily) for 16 (1987) or 21 (1988) days during transplant production in the greenhouse. The epicuticular waxes of the uppermost fully expanded leaves were removed by dipping detached leaves into methylene chloride. The extract was derivatized with trimethylsilyl reagents and subjected to capillary gas chromatography. The primary epicuticular wax components were the nonpolar C29 compounds nonacosane, nonacosan-15-ol, and nonacosan-15-one, which were identified by mass spectrometry. In a Summer 1987 experiment, cuticle samples taken over time of treatment indicated acclimation to the conditioning treatments relative to untreated plants. After 9 days of treatment, the amount of total epicuticular waxes present on the leaves was reduced 38%, 31%, or 11% by wind, brushing, or MSC, respectively. However, after 15 days of treatment, the amount of cuticle present was reduced 15% by brushing but only 6% by wind and was 17% greater in MSC-treated plants. Two weeks after transplanting to the field there were no differences in the amount or composition of the epicuticular waxes. In Fall 1988, all treatments reduced plant growth, but only MSC tended to increase the amount of C29 epicuticular components during greenhouse production. Differences in the amounts of epicuticular waxes were no longer significant after 8 days in the field.
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Meyn, Andrea, Peter S. White, Constanze Buhk, and Anke Jentsch. "Environmental drivers of large, infrequent wildfires: the emerging conceptual model." Progress in Physical Geography: Earth and Environment 31, no. 3 (June 2007): 287–312. http://dx.doi.org/10.1177/0309133307079365.
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Large, infrequent fires (LIFs) can have substantial impacts on both ecosystems and the economy. To better understand LIFs and to better predict the effects of human management and climate change on their occurrence, we must first determine the factors that produce them. Here, we review local and regional literature investigating the drivers of LIFs. The emerging conceptual model proposes that ecosystems can be typified based on climatic conditions that determine both fuel moisture and fuel amount. The concept distinguishes three ecosystem types: (1) biomass-rich, rarely dry ecosystems where fuel moisture rather than fuel amount limits LIFs; (2) biomass-poor, at least seasonally dry ecosystems where fuel amount rather than fuel moisture limits LIFs; and (3) biomass-poor, rarely dry ecosystems where both fuel amount and fuel moisture limit the occurrence of LIFs. Our main goal in this paper is to discuss the drivers of LIFs and the three mentioned ecosystem types in a global context. Further, we will discuss the drivers that are not included within the `fuels' versus `climate' discussion. Finally, we will address the question: what kinds of additional information are needed if models predicting LIFs are to be coupled with global climate models? As with all generalizations, there are local deviations and modifications due to processes such as disturbance interaction or human impact. These processes tend to obscure the general patterns of the occurrence of LIFs and are likely to cause much of the observed controversy and confusion in the literature.
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Berezovskiy, Yu M., I. A. Korolev, I. V. Agafonkina, and T. A. Sarancev. "Investigation of the effect of beef moisture content on the amount of bound moisture with the calorimetric method." Proceedings of the Voronezh State University of Engineering Technologies 80, no. 4 (March 21, 2019): 25–29. http://dx.doi.org/10.20914/2310-1202-2018-4-25-29.
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With the development of food processing and storage at near-cryoscopic temperatures, more and more attention is being paid to the development of methods for frozen out moisture and cryoscopic temperature calculating based on their component composition data. There is a significant dispersion among the existing experimental data of various researchers and calculation methods for beef thermophysical properties. In the study given, the authors determined the enthalpy of phase transitions, beet heat capacity with different moisture content and its cryoscopic temperature with the method of differential scanning calorimetry. With the analysis of the phase transitions enthalpy, it was found out that the share of non-freezing water for beef is n = 0.35 (g of water per 1 g of dry matter). The presence of the vitreous phase in the temperature range of about -85 ° С was established, most noticeably manifested when the moisture content of the samples is w = 37–45.8%, which indicates the formation of amorphous solutions in the process of food products freezing. Beginning of moisture melting peak Tm.b. takes place at temperatures range from -35 ° C till -25 ° C for the samples with low and normal moisture content respectively. Acccording to the theoretical Heldman ratio, a dependence for cryoscopic temperature calculating was proposed . The given semi-empirical dependences of the phase transitions enthalpy and the frozen moisture fraction provide an increase in the accuracy of calculations at low values of moisture content in the product. The research results can be used as input data in mathematical modeling of heat exchange processes and the development of calculating methods for the thermophysical properties of food products based on their composition.
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Kondratyev, N. B., E. V. Kazantsev, M. V. Osipov, A. E. Bazhenova, and N. V. Linovskaya. "The influence of the amount of caramel syrup on the processes of moisture transfer during the storage of marmalade." Proceedings of the Voronezh State University of Engineering Technologies 82, no. 4 (January 20, 2021): 24–29. http://dx.doi.org/10.20914/2310-1202-2020-4-24-29.
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Storage problems for various types of confectionery products are associated with the physical state of the contained water and its migration processes. This work is aimed at predicting the storage capacity and increasing the shelf life of various groups of marmalade. The influence of the content of caramel syrup (5 - 25%) in jelly marmalade (JM) on apple (YP) and citrus (CP) pectin on the processes of moisture transfer during storage of products packed in BOPP film 20, 40 microns has been investigated. The composition and amount of molasses forms the features of the phase transitions of sugars and the ratio of free and bound moisture, which has a significant effect on the texture and organoleptic properties of FMs during storage. Moisture migration was characterized by the mass fraction of moisture and water activity. The results showed that over 12 weeks of storage, the moisture content of the sample with CP, containing 5% molasses, decreased from 22.0% to 19.6%, the rate of decrease in the mass fraction of moisture was 0.2% per week. For a sample containing 25% molasses, the rate of decrease in the mass fraction of moisture was 0.4% per week. For 12 weeks of storage, the mass fraction of moisture in the sample with NP, containing 25% molasses, decreased from 22.0% to 19.6%. As a result, for a sample made with YF containing 25% molasses, the rate of decrease in the mass fraction of moisture was 0.2% per week, and containing 5% molasses - only 0.1% per week. An increase in the mass fraction of molasses from 5.0% to 25.0% in the chemical composition of the FM leads to an increase in the rate of moisture transfer, approximately two times, while the water activity of the products practically does not change during storage and is 0.750 - 0.760. With an increase in the thickness of the polypropylene film from 20 ?m to 40 ?m, the rate of moisture transfer processes decreases approximately two times.
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V.S., Belyj, Bryl S.V., Mishina A.M., and Zverkov M.S. "The assessment of the possibilities of reducing the number of tests of the initial moisture content in the foam-polymer-mineral insulation of pipes." Ekologiya i stroitelstvo 2 (2018): 35–43. http://dx.doi.org/10.35688/2413-8452-2018-02-005.
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This article proposes a method of assessing the type and parameters of the distribution of the initial moisture content of the foam-polymer-mineral (PPM) insulation of steel pipes of underground heat pipes, as well as a method of testing the statistical hypothesis about the type and parameters of the distribution of moisture content. Investigated the possibility of reducing the amount of testing of PPM insulation steel pipe on the subject of the original moisture content without reducing the accuracy and reliability of the estimation of the true values of the original moisture content.
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Wang, S., B. J. Fu, G. Y. Gao, and J. Zhou. "The hydrological responses of different land cover types in a re-vegetation catchment area of the Loess Plateau, China." Hydrology and Earth System Sciences Discussions 9, no. 5 (May 4, 2012): 5809–35. http://dx.doi.org/10.5194/hessd-9-5809-2012.
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Abstract. The impact of re-vegetation on soil moisture dynamics was investigated by comparing five land cover types. Soil moisture and temperature variations under grass (Andropogon), subshrub (Artemisia scoparia), shrub (Spiraea pubescens), tree (Robinia pseudoacacia), and crop (Zea mays) vegetation were monitored in an experiment performed during the growing season of 2011. There were more than 10 soil moisture pulses during the period of data collection, and the surface soil moisture of all of the land cover types showed an increasing trend. Corn cover was associated with consistently higher soil moisture readings than the other surfaces. Grass and subshrubs showed an intermediate moisture level, with that of grass being slightly higher than that of subshrub most of the time. Shrubs and trees were characterized by lower soil moisture readings, with the shrub levels consistently being slightly higher than those of the trees. With the exception of the corn land cover type, the average soil temperature showed the same regime as the average moisture content, but exhibiting a downward trend throughout the observation period. Three typical decreasing periods were chosen to compare the differences in water losses. In periods of both relatively lower and higher water soil moisture contents, subshrubs lost the largest amount of water. The daily water loss associated with corn was most variable. The tree and shrub sites presented an intermediate level, with that of tree being slightly higher compared to shrub; the daily water loss trends of these two land cover types were similar and were more stable than those of the other types. The amount of water loss related to the grass land cover type is determined by the initial moisture content. Soil under subshrubs acquired and retained soil moisture resources more efficiently than the other cover types, representing an adaptive vegetation type in this area.
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Ansley, RJ, DL Jones, TR Tunnell, BA Kramp, and PW Jacoby. "Honey Mesquite Canopy Responses to Single Winter Fires: Relation to Herbaceous Fuel, Weather and Fire Temperature." International Journal of Wildland Fire 8, no. 4 (1998): 241. http://dx.doi.org/10.1071/wf9980241.
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Honey mesquite (Prosopis glandulosa Torr.) canopy responses to fire were measured following 20 single winter fires conducted in north Texas. Weather conditions during the fires, understory herbaceous fine fuel (fine fuel) amount and moisture content, fire temperature at 0 cm, 10-30 cm and 1-3 m above ground, and canopy responses were compared. Ten fires occurred on a site where fine fuel was a mixture of cool and warm season grasses (mixed site). The other 10 fires occurred on a site dominated by warm season grasses (warm site). When both sites were included in regressions, peak fire temperature at all heights was positively related to fine fuel amount. Fine fuel amount, fine fuel moisture content, air temperature (AT) and relative humidity (RH) affected fire temperature duration in seconds over 100°C (FTD100) at 1-3 m height, but not at ground level. Mesquite percent above-ground mortality (topkill) increased with increasing fine fuel amount, decreasing fuel moisture content, increasing AT, and decreasing RH. Percent foliage remaining on non-topkilled (NTK) trees was inversely related to fine fuel amount and AT, and positively related to fine fuel moisture content. Effect of fire on mesquite topkill and foliage remaining of NTK trees was strongly affected by RH at the warm site (r2 = 0.92 and 0.82, respectively), but not at the mixed site. This difference was due to RH affecting fuel moisture content (and subsequently fire behavior) to a greater degree at the warm than at the mixed site, because of the lower green tissue content in warm site grasses at the time of burning. Under adequate fine fuel amounts to carry a fire, mesquite canopy responses to fire (i.e., topkill vs, partial canopy defoliation) were largely determined by AT and RH conditions during the fire. This has implications if the management goal is to preserve the mesquite overstory for a savanna result instead of topkilling all trees. Two substudies were conducted during 3 of the fires. Substudy 1 determined mesquite response to fire in 2 plots with different understory herbaceous fuel loads (5,759 vs. 2,547 kg/ha) that were burned under under similar weather conditions. Mesquite topkill was 81% and 11% in the high and low fuel fires, respectively. Under similar weather conditions, fine fuel was an important factor in affecting mesquite responses to fire. However, as demonstrated in the main study, under a variety of weather conditions, AT and RH influenced mesquite response to fire as much or more than did fine fuel. Substudy 2 compared response of mesquite plants with abundant and dry subcanopy fine fuel (3252 kg/ha; fuel moisture 10.4%), or sparse and green subcanopy fuel (1155 kg/ha; fuel moisture 25.9%) to a high intensity fire. All trees were topkilled, including those with low subcanopy fuel, probably from convection heat generated from herbaceous fuel in interspaces between trees. In support of this conclusion, thermocouple data from all 20 fires indicated that canopy responses were more related to fire temperature at 1-3 m than at lower heights. This suggests that the topkill mechanism was due to convective heat within the canopy rather than a girdling effect of fire at stem bases.
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Schumacher, Russ S., Thomas J. Galarneau, and Lance F. Bosart. "Distant Effects of a Recurving Tropical Cyclone on Rainfall in a Midlatitude Convective System: A High-Impact Predecessor Rain Event*." Monthly Weather Review 139, no. 2 (February 1, 2011): 650–67. http://dx.doi.org/10.1175/2010mwr3453.1.
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Abstract Recent research has identified predecessor rain events (PREs), which are mesoscale regions of heavy rainfall that occur ∼1000 km poleward and downshear of recurving tropical cyclones (TCs). PREs typically occur 24–36 h prior to the arrival of the main rain shield associated with the TC, and frequently result in damaging flooding. A distinguishing feature of a PRE is that it is enhanced by a broad region of deep tropical moisture directly associated with the TC that is transported well poleward ahead of the TC. This study will quantify the effects of the tropical moisture from one TC on a record-breaking rain and flood event over the northern Great Plains and southern Great Lakes region on 18–19 August 2007. In this event, which occurred ahead of TC Erin, a southerly stream of deep tropical moisture (precipitable water values >50 mm) moved poleward and intersected a northwest–southeast-oriented quasi-stationary baroclinic zone beneath the equatorward entrance region of an upper-level jet streak. A slow-moving mesoscale convective system (MCS) developed and produced widespread heavy rainfall, with local amounts exceeding 380 mm that resulted in historic flooding in Minnesota and Wisconsin. Observations and numerical simulations using the Advanced Research Weather Research and Forecasting model (ARW-WRF) indicate that low-level frontogenesis was maximized during the overnight hours of 19 August 2007 and provided the forcing for vigorous ascent during the mature stage of the PRE. A control simulation, which included the poleward transport of TC Erin-related moisture, reproduced the extreme rainfall amounts, although the simulated rainfall was displaced from where it was observed. A sensitivity simulation in which the moisture associated with TC Erin was removed (referred to as “NOPLUME”) shows reduced convective available potential energy (CAPE) in the inflow region of the PRE and a less vigorous MCS. In all, there was an approximately 50% reduction in the maximum precipitation amount and a 25% reduction in the total precipitation from the control simulation to the NOPLUME run. Or, considered in the context of rainfall enhancement by the Erin-related moisture, there was a near doubling of the maximum amount and a 33% increase in the total rainfall. The extent of these differences underscores the importance of moisture originating from TC Erin in transforming a heavy rain event into a high-impact, record-breaking rain event.
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Kochubei-Lytvynenko, Oksana, Andrii Marynin, Natalya Yushchenko, Ulyana Kuzmyk, and Maxim Lazarenko. "THERMOGRAVIMETRIC ANALYSIS OF INDICATORS OF THE PASTE BASED ON SOUR CREAM." EUREKA: Life Sciences 6 (November 30, 2017): 3–9. http://dx.doi.org/10.21303/2504-5695.2017.00493.
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For forming structural-mechanical properties of sour milk pastes and guaranteeing their stability at storage, it is promising to use non-fried buckwheat in their recipes that allows to raise the food value of products additionally. The aim of the researches was the study of features of the condition of moisture of sour milk pastes, based on sour cream with introducing non-fried buckwheat in the amount 5,0 % of the mixture mass. A sample with modified starch Е 1410 was taken as a control in the amount 1,3 %. The study of the moisture condition was realized by the thermogravimetric method using a derivatograph Q-1500D (Paulik-Erdey) (Hungry). It was established, that the content of adsorptive moisture of the sour milk paste was 34,0 %, whereas in the control – 34,5 %, that confirm the effectiveness of using non-fried buckwheat as a moisture-binding component. Such properties of non-fried buckwheat may be explained by the presence of starch compounds and easily accessible protein in its composition, able to hydration in the process of preparation of a component and to keeping moisture at further storage of a product.
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Bouketir, O. "An automatic irrigation system for water optimization in the Algerian agricultural sector." Agricultural Science and Technology 11, no. 2 (June 2019): 133–37. http://dx.doi.org/10.15547/ast.2019.02.021.
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Abstract. Algeria is a vast country with three climatic types and different water resources. These resources are limited especially in the climatic zone two where most staple crops (e.g. wheat) are cultivated. To manage these water resources efficiently, traditional irrigation systems should be replaced by those based on advanced technological techniques. This paper introduces an irrigation system prototype constructed at the department of Electrical Engineering, University of Setif in Algeria. This prototype allows the control of the amount of water dispensed to the plant according to its soil moisture. The circuit was built around an Arduino microcontroller. A program was developed and burned into the microcontroller which was able to sense the amount of the moisture in the plant soil through a moisture sensor. According to this moisture quantity, the microcontroller is to take decision to on or off a small pump for an optimum time and flow speed. The pump was driven by a direct current motor which was controlled by a pulse width modulation dc chopper. The system is enhanced by a liquid crystal display to inform the operator about the moisture percentage, status of the pump and its speed.