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Letteratura scientifica selezionata sul tema "Soil nutrient"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 9 giugno 2025

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Articoli di riviste sul tema "Soil nutrient"

Thomson, V. P., and M. R. Leishman. "Survival of native plants of Hawkesbury Sandstone communities with additional nutrients: effect of plant age and habitat." Australian Journal of Botany 52, no. 2 (2004): 141. http://dx.doi.org/10.1071/bt03047.

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Australian soils are naturally low in nutrient concentrations, particularly nitrogen (N) and phosphorus (P). Native plants are well adapted to low-nutrient soils, and can be adversely affected when exposed to higher concentrations of nutrients. The Hawkesbury Sandstone soils in northern Sydney are naturally low in nutrients, but often receive additional nutrient input from urban stormwater run-off. Increases in soil nutrients in urban bushland are associated with the presence of exotic species, and the decline in the diversity of native species. This study tested the hypothesis that high concentrations of nutrients, in particular P, in the disturbed soils of urban bushland, reduce survival of native plants. We examined the survival of native species under five different nutrient concentrations that are typical of nutrient-enriched urban bushland soil, in two glasshouse experiments. The experiments examined both survival of seedlings and survival of 6-month-old plants. We used native species that are adapted to both nutrient-poor and nutrient-rich soils. In general, the survival of native plants decreased with increasing nutrient concentrations. At soil total-P concentrations >200 mg kg–1, most plants died. Seedlings were more sensitive to added nutrients than the 6-month-old plants. Species that were from higher-nutrient soil had consistently higher survival than species from low-nutrient soils, under the nutrient addition treatments. These results suggest that at high soil nutrient concentrations typical of stormwater-affected urban bushland, native plant species of low-nutrient soils will be unable to survive. If ecological restoration works are to be done in such areas, replanting with more mature plants from naturally high-nutrient habitats is likely to be the most successful. However, restoration of these areas may have limited success and they are likely to remain dominated by exotic plant species.

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Ye, Chang, Guangjie Zheng, Yi Tao, Yanan Xu, Guang Chu, Chunmei Xu, Song Chen, Yuanhui Liu, Xiufu Zhang, and Danying Wang. "Effect of Soil Texture on Soil Nutrient Status and Rice Nutrient Absorption in Paddy Soils." Agronomy 14, no. 6 (June 20, 2024): 1339. http://dx.doi.org/10.3390/agronomy14061339.

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Soil texture affects rice nutrient uptake and yield formation by influencing soil structure, microbial activity, and soil nutrient supply capacity. Analyzing the relationship between soil texture, nutrient content, and rice agronomic traits is of great significance for precise and efficient fertilizer application. The tillage layer (0–20 cm) of 31 paddy fields in China’s main rice-producing areas was collected to perform rice pot experiments, and soil texture characteristics, physicochemical properties, microbial-related indicators, and rice agronomic traits were measured and analyzed. The results showed that these soils could be classified into four types of soil texture: loamy sandy soil, sandy loam soil, silty loam soil, and silty soil. Analysis of variance showed that the available nitrogen (AN), available potassium (AK), and available phosphorus (AP) contents were the highest in silty loam, silty, and sandy loam soils, respectively, and silt loamy soil had the highest CEC. Principal component analysis (PCA) also showed that soil physicochemical properties can be distinguished to a certain extent according to soil texture types. For the relationship of soil texture parameters and soil physicochemical properties, soil organic matter (OM), total nitrogen (TN), AN, ammonium nitrogen (NH4+-N), and microbial carbon (MBC) contents were positively correlated with soil clay content, AK was positively correlated with silt content, and soil phosphorus status was significantly related to pH. Mantel’s test revealed significant correlations between rice N, P, and K nutrient status, dry matter accumulation, and yield, and soil available nutrient content, MBC, pH, and soil texture parameters. Structural equation modeling (SEM) indicated that sand affected soil available nutrients by regulating pH, while clay can positively influence soil available nutrients by affecting soil organic matter mineralization and microbial activity, thus influencing nutrient absorption and yield formation in rice. Overall, in rice production, the silty and silty loam paddy soil with fine texture and higher clay content facilitates the mineralization of soil organic matter and the activity of soil microbes, resulting in more available soil nutrients, which benefits the rice absorption and accumulation of nutrients. Furthermore, a higher content of clay also promotes the distribution of dry matter to the panicle, thereby promoting rice yield formation.

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Molina, Armando, Veerle Vanacker, Oliver Chadwick, Santiago Zhiminaicela, Marife Corre, and Edzo Veldkamp. "Vegetation patterns associated with nutrient availability and supply in high-elevation tropical Andean ecosystems." Biogeosciences 21, no. 12 (July 1, 2024): 3075–91. http://dx.doi.org/10.5194/bg-21-3075-2024.

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Abstract. Plants absorb nutrients and water through their roots and modulate soil biogeochemical cycles. The mechanisms of water and nutrient uptake by plants depend on climatic and edaphic conditions, as well as the plant root system. Soil solution is the medium in which abiotic and biotic processes exchange nutrients, and nutrient concentrations vary with the abundance of reactive minerals and fluid residence times. High-altitude ecosystems of the tropical Andes are interesting for the study of the association between vegetation, soil hydrology, and mineral nutrient availability at the landscape scale for different reasons. First of all, because of low rock-derived nutrient stocks in intensely weathered volcanic soils, biocycling of essential nutrients by plants is expected to be important for plant nutrient acquisition. Second, the ecosystem is characterized by strong spatial patterns in vegetation type and density at the landscape scale and hence is optimal to study soil-water–vegetation interactions. Third, the area is characterized by high carbon stocks but low rates of organic decomposition that might vary with soil hydrology, soil development, and geochemistry, all interconnected with vegetation. The páramo landscape forms a vegetation mosaic of bunch grasses, cushion-forming plants, and forests. In the nutrient-depleted nonallophanic Andosols, the plant rooting depth varies with drainage and soil moisture conditions. Rooting depths were shallower in seasonally waterlogged soils under cushion plants and deeper in well-drained soils under forest and tussock grasses (>100 cm). Vegetation composition is a relevant indicator of rock-derived nutrient availability in soil solutions. The soil solute chemistry revealed patterns in plant-available nutrients that were not mimicking the distribution of total rock-derived nutrients nor the exchangeable nutrient pool but clearly resulted from strong biocycling of cations and removal of nutrients from the soil by plant uptake or deep leaching. Soils under cushion plants showed solute concentrations of Ca, Mg, and Na of about 3 times higher than forest and tussock grasses. Differences were even stronger for dissolved Si with solute concentrations that were 16 times higher than forest and 6 times higher than tussock grasses. Amongst the macronutrients derived from lithogenic sources, P was a limiting nutrient with very low solute concentrations (<1 µM) for all three vegetation types. In contrast K showed greater solute concentrations under forest soils with values that were 2 to 3 times higher than under cushion-forming plants or tussock grasses. Our findings have important implications for future management of Andean páramo ecosystems where vegetation type distributions are dynamically changing as a result of warming temperatures and land use change. Such alterations may lead not only to changes in soil hydrology and solute geochemistry but also to complex changes in weathering rates and solute export downstream with effects on nutrient concentrations in Andean rivers and high-mountain lakes.

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Ma, Qifu, Zed Rengel, and Terry Rose. "The effectiveness of deep placement of fertilisers is determined by crop species and edaphic conditions in Mediterranean-type environments: a review." Soil Research 47, no. 1 (2009): 19. http://dx.doi.org/10.1071/sr08105.

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Much of our knowledge of plant growth in response to soil nutrient supply comes from studies under homogeneous soil conditions. However, the adoption of reduced or nil tillage and shallow banding of fertilisers at the time of seeding causes spatially variable distribution and availability of soil nutrients in agricultural lands. Soil available nutrients, particularly the poorly mobile ones such as phosphorus (P), potassium (K), zinc (Zn), manganese (Mn), and copper (Cu), stratify within the fertilised topsoil. In water-limited environments where the topsoil is prone to drying, soil nutrient stratification may influence nutrient availability and plant uptake because of impeded root growth or reduced diffusion of immobile nutrients to the root surface, or more likely a combination of both factors. Placing fertilisers deeper in the soil profile could increase nutrient acquisition and utilisation by plants as fertiliser nutrients are in the moist soil for a longer part of the growing season. However, the effectiveness of deep placement of fertilisers may also be determined by soil texture, tillage, fertilising history, nutrient mobility, and crop species. In Mediterranean-type climates of southern Australia, a yield response of winter crops to deep fertiliser mostly occurs on infertile sandy soils in low rainfall regions. This contrasts with the responses of winter and summer crops in northern Australia on soils with optimum-to-high nutrients but subjected to rapid and frequent drying of topsoil because of high temperatures and high evaporation demand during the growing season. The pattern of nutrient accumulation by crop species (indeterminate v. determinate) and the mobility of mineral nutrients in the phloem would also modify the effectiveness of deep-placed nutrients under drought. The complexity of plant responses to subsoil nutrition may suggest that before adopting deep fertiliser practice in a paddock it is essential to understand the effects of edaphic and climatic conditions, soil management, and plant–soil interactions in order to achieve maximum yield benefit.

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Comerford, N. B., W. P. Cropper, Jr., Hua Li, P. J. Smethurst, K. C. J. Van Rees, E. J. Jokela, H. Adégbidi, and N. F. Barros. "Soil supply and nutrient demand (SSAND): A general nutrient uptake model and an example of its application to forest management." Canadian Journal of Soil Science 86, no. 4 (August 1, 2006): 655–73. http://dx.doi.org/10.4141/s05-112.

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Models of soil nutrient bioavailability and uptake assist in nutrient management and lead to a better understanding of nutrient dynamics in the soil-plant system. SSAND (Soil Supply and Nutrient Demand) is a steady state, mechanistic nutrient uptake simulation model based on mass flow and diffusive supply of nutrients to roots. It requires user inputs for soil and plant parameters to calculate a nutrient’s concentration at the root surface and the subsequent uptake by a plant root and/or extrametrical mycorrhizal hyphae. It can be considered a sub-model linked to hydrological or plant growth models. SSAND provides a basis for simulating nutrient uptake under different soil-plant scenarios, including multiple soil compartments, net mineralization inputs, changing root growth, changing mycorrhizal hyphae growth, changing soil water content and multiple fertilizer events. It incorporates uptake from roots and mycorrhizal hyphae, including the potential competition between these entities. It should be useful for simulating the effects of climate change on soil nutrient bioavailability. It should also be a useful tool for managers in evaluating fertilizer regime options. Key words: Nutrient bioavailability, nutrient uptake modeling, phosphorus uptake, mycorrhizae, Spodosols, climate change

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Seman-Varner, R., R. McSorley, and R. N. Gallaher. "Soil nutrient and plant responses to solarization in an agroecosystem utilizing an organic nutrient source." Renewable Agriculture and Food Systems 23, no. 2 (May 27, 2008): 149–54. http://dx.doi.org/10.1017/s1742170507002001.

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AbstractSoil solarization is used to manage nematodes, pathogens and weeds, but relatively few studies have examined solarization effects on soil mineral nutrients, soil properties and plant tissue nutrients. This study was designed to optimize the duration of solarization treatment for the management of soil and plant nutrients and crop biomass in an agroecosystem utilizing an organic nutrient source. The experiment was a split-plot with treatment duration as the main effect and solarization as the sub-effect. Solarization treatments of 2-, 4- and 6-week durations began on sequential dates and concluded in mid-August. Immediately post-treatment, okra (Hibiscus esculentus L.) seedlings were transplanted into subplots for tissue nutrient analysis. Freshly chopped cowpea [Vigna unguiculata (L.) Walp.] hay was applied to the soil surface directly around the okra seedlings as an organic nutrient source. Immediately following solarization treatment, concentrations of soil K and Mn were higher, while Cu and Zn concentrations were lower in solarized soils than in non-solarized soils. Soil pH was slightly lower in solarized plots. Concentrations of K, N, Mg and Mn in okra leaf tissue were higher in solarized plots than in non-solarized plots, but concentrations of P and Zn were lower in plants grown in solarized soil. Okra biomass was three and four times higher in the 4- and 6-week solarization treatments than in non-solarized treatments. Based on data from this experiment, 4- and 6-week durations of solarization were optimal for increasing crop biomass. The data indicate that solarization has significant effects on soil and plant nutrients. Results of the nutrient analyses suggest that the availability of nutrients from an organic source was not limited by solarization.

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Moore, James A., Mark J. Kimsey, Mariann Garrison-Johnston, Terry M. Shaw, Peter Mika, and Jaslam Poolakkal. "Geologic Soil Parent Material Influence on Forest Surface Soil Chemical Characteristics in the Inland Northwest, USA." Forests 13, no. 9 (August 27, 2022): 1363. http://dx.doi.org/10.3390/f13091363.

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Successful fertilization treatments targeted to improve stand productivity while reducing operational complexities and cost depend on a clear understanding of soil nutrient availability under varying environmental conditions. Soil nutrient data collected from 154 forest sites throughout the Inland Northwest, USA were analyzed to examine soil nutrient characteristics on different geologic soil parent materials and to rank soil fertility. Results show that soil parent material explains significant differences in soil nutrient availability. Soils developed from volcanic rocks have the highest cation exchange capacity (CEC) and are relatively high in phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulfur (S), boron (B), and copper (Cu), but generally poor in mineralizable nitrogen (MinN). Forest soils developed from plutonic rocks exhibit the lowest CEC and are low in MinN, K, Ca, Mg, S, and Cu, but higher in P. Some soils located on mixed glacially derived soils are low only in K, Ca, Mg, and Cu, but many mixed glacial soils are relatively rich in other nutrients, albeit the second lowest CEC. Soils developed from metasedimentary and sedimentary rocks are among those with lowest soil nutrient availability for P and B. Sulfur was found to have the highest concentrations in metasedimentary influenced soils and the least in sedimentary derived soils. Our results should be useful in designing site-specific fertilizer and nutrient management prescriptions for forest stands growing on soils developed from these major geologies within the Inland Northwest region of the United States.

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Agada, B. I., LS O. Tasie, S. S. Snapp, and P. I. Agber. "Soil Nutrient Status of Smallholder Farmers in Makurdi, Benue State, Nigeria." Journal of Global Agriculture and Ecology 16, no. 2 (May 29, 2024): 50–59. http://dx.doi.org/10.56557/jogae/2024/v16i28710.

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Soil nutrient depletion is a major threat to food security globally. The fertility status of soil forms the foundation of crop production in many small holder farm fields as nutrient element additions as inorganic, synthetic or organic fertilizers are low. Soils from small holder farmer fields were sampled individually with three (3) samples per the farmers field by three (3) depths of 0-30cm, 30-60 cm and 60-90cm with a population of thirty (30) farmers per council ward by three (3 )council wards only in ten (10) local government area (LGAs)) of Benue state. This paper reports for one (1) local government area - Makurdi, and one (1) depth, the topsoil (0-30cm). The study was to ascertain their nutrient status in three states in Nigeria with the creation of the first- ever digitalized and interactive nutrient elements and soil productivity index maps. We report findings for the soil nutrient status of the topsoils for Benue State as a digitalized map see link https://rb.gy/yfnz2m with focus on Makurdi local government area (LGA). The soil samples collected were geo-referenced and analyzed both insitu and in the laboratory following recommended standards for each nutrient element to define the soil nutrient status and critical limit for maize production. Generally, soils were sandy loam at the surface (0-30cm) while it was sandy clay loam at lower depths of 60cm and 90cm. The soils had moderate acidity with low to moderate levels of nutrients. The low nutrient status of the soil key nutrients of Nitrogen, phosphorus and potassium, underscores the need for improved soil management practices. These findings, supports a transition from current country wide fertilizer recommendation to site -specific nutrient management. New findings reported here are location specific and will aid in the curbing of greenhouse gases emissions for a healthier planet as well as increased productivity.

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National, Press Associates. "SOIL TESTING IS NECESSARY TO IMPROVE CROP PRODUCTIVITY AND SOIL HEALTH." Research & Reviews in Biotechnology & Biosciences 11, no. 2 (January 6, 2025): 7–10. https://doi.org/10.5281/zenodo.14605865.

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To understand the general physical, chemical, and biological activity of soil, soil testing is essential. There is unquestionably a nutrient shortage in the soil and crop when we observe that the soils are not reacting to crop sowing or fertilizer application. As a result, we are unable to attain the best possible crop growth, production, and soil health. Nutrient balance between crops and soil is ultimately negative. Farmers are nearly always providing direct All nutrients, including fertilizer, will be fully mined. Based on the results of a soil test, attained soil and crop health. Thus, soil testing will be necessary in the future to improve Crop yield, nutrient shortage, and soil fertility

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Entry, James A., and William H. Emmingham. "Influence of forest age on nutrient availability and storage in coniferous soils of the Oregon Coast Range." Canadian Journal of Forest Research 25, no. 1 (January 1, 1995): 114–20. http://dx.doi.org/10.1139/x95-014.

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A substantial fraction of the organic matter and plant essential nutrients in forest ecosystems are contained in the soil. The role of soils in nutrient storage and availability is an essential component of ecosystem function and stability. The top 10 cm of soil contains the highest concentration of nutrients. To determine the influence of forest age on nutrient storage and availability in riparian soils, we compared concentrations, storage, and extractability of plant nutrients in the litter layer and top 10 cm of mineral soil in old-, second-, and young-growth riparian forests. The analysis of variance for nutrient concentration, nutrient storage, or nutrients extracted in both the litter layer and top 10 cm of mineral soil showed no significant differences among sites or seasons for any nutrient; only differences among forest ages will be discussed. Concentrations of N, P, Mg, Mn, and Cu in forest litter did not differ by forest age, but concentrations of K, Ca, and B were significantly higher in old-growth forest litter than in the litter of second-or young-growth forests. In mineral soil, the concentrations of all nutrients were statistically equal for all forest ages. Old-growth forests stored significantly (P ≤ 0.05) greater amounts of all nutrients measured in the litter layer, and greater amounts of N, P, and K in the mineral soil, than were stored in second- or young-growth forests. Greater amounts of P, B, and Zn were extracted from old-growth forest litter than from either second- or young-growth forest litter, and greater amounts of P, K, Mn, B, and Zn were extracted from old-growth mineral soil than from second- or young-growth mineral soil. The amount of each nutrient stored in the litter layer of the different-aged forests correlated curvilinearly with the amount of C in the litter layer of these forests; r2 ranged from 0.60 to 0.83. Also, the amount of N, K, and Ca stored in the mineral soil correlated curvilinearly with the amount of C in the soil; r2 ranged from 0.50 to 0.76.

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Più fonti

Tesi sul tema "Soil nutrient"

Esposito, Nicole C. "Soil Nutrient Availability Properties of Biochar." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1096.

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Biochar’s high porosity and negative surface charge allows for numerous soil and plant benefits such as increased water retention, high nutrient availability, and plant growth. By analysing biochar’s effect of all of these factors, a system can be put in place in which soils can be remediated with the proper soil amendments. This report discusses and tests the effects of varying rates of biochar on pH levels, cation exchange capacity, and nutrient exchangeability (of calcium, magnesium, sodium, and potassium) in soil. Corn plants were also grown in soils of varying amendment types and analysed for plant growth and germination to determine soil effects on the plant. Testing showed significant differences between treatment types in all areas tested except plant germination. A 2:1 ratio of biochar to compost produced the best overall results for the soil used in testing. This treatment maintained acceptable levels of exchangeable nutrients while raising pH and cation exchange capacity, and also raised the plant growth in the soil by 30%. However, for added soil health, gypsum or calcium fertilizer should be added to the soil to remediate low calcium exchangeability. This testing confirmed that biochar does have a strong positive influence on soil and plant health when used in combination with compost.

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Kraus, Tamara Esther Caroline. "Tannins and nutrient dynamics in forest soils : plant-litter-soil interactions /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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Ferreira, Francisco Jardelson. "Fertilization rose bushes based on nutrient balance in the soil - plant system." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=17134.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>Rose is an economically important crop for the national and the international market and due to this fact generates income to the Ceara State. Rose is a demanding crop in relation to fertilizers, requiring knowledge of soil fertility, nutritional plant requirements and nutrients use efficiency to obtain adequate fertilization. Based on the nutritional balance through the use of mechanistic and empirical models, it is possible to develop a system to quantify the plant nutrients demands to achieve a given productivity. This paper aims to establish parameters of a fertilizer and lime recommendation system to rose crop, based on the plant nutritional balance. The experiment was conducted at the company Cearosa in SÃo Benedito - CE. Plants will be collected during five months and once a month, five rose plants from four varieties (Top Secret, Avalanche, Attache and Ambience) As contradictory Airlines plants Were grinded. Samples will be ground and nutrients content will be determined: N, P, K, Ca, Mg, S, B, Fe, Mn, e Zn. Every sampling plant time, were also soil samples collected at two depths (0-20 and 20-40 cm) In which they underwent fertility analysis. To estimate the fertilizer recommendation, the system was be subdivided into requirement subsystem (REQ), which includes the plant nutrients demands, considering the recovery efficiency of the nutrients to be applied and a rate to achieve the "sustainability" criteria and the supply subsystem (SUP) that comprises the soil nutrient supply. After determining the total REQ and SUP, held -if the nutritional balance, and if the result is positive (REQ> SUP), fertilizers application is recommended and if the result negative or zero (REQ ≤ SUP), fertilizers application is not recommended. The system estimated that there is excess nitrogen and phosphorus fertilization for all cultivars , however , there needs to be supplemental potassium fertilizer . The system estimated that the soil is able to meet the demand of plants for P and Fe for all cultivars , however , there must be supplementary nitrogen fertilizer , potassium . As for micronutrients , the system estimated that there is need for additional fertilizer for Zn in all rosebushes and Mn for the rosebushes "Top Secret " and " Avalnche " , however with very close recommendation the optimal dose , ie equal to zero<br>A roseira Ã uma cultura de grande valor no mercado interno e externo, devido a esse fato, as rosas geram benefÃcios para o estado do CearÃ. Ã uma cultura muito exigente em relaÃÃo Ã adubaÃÃo, sendo necessÃrios conhecimentos da fertilidade do solo, exigÃncias nutricionais da planta e eficiÃncia na utilizaÃÃo de nutrientes, para obtenÃÃo de uma adubaÃÃo adequada. Partindo a hipÃtese de que conhecendo-se o balanÃo nutricional da cultura, levando-se em consideraÃÃo a demanda de nutrientes pela cultura para alcanÃar uma dada produtividade e o suprimento de nutrientes pelo solo, Ã possÃvel determinar a quantidade de nutrientes a ser adicionada na fertilizaÃÃo do solo. O presente trabalho tem como objetivo determinar com base no balanÃo de nutrientes solo-planta a quantidade de nutrientes a ser adicionada no solo para cultura da roseira. O experimento foi conduzido na empresa Cearosa, em SÃo Benedito - CE, as plantas foram coletadas durante cinco meses, sendo uma vez por mÃs, amostrando cinco plantas aleatÃrias, de quatro cultivares de rosas: (Top Secret, Avalanche, Attache e Ambience). As partes aÃreas das plantas foram moÃdas e mineralizadas para determinaÃÃo dos teores dos nutrientes: N, P, K, Ca, Mg, S, B, Fe, Mn e Zn. Simultaneamente a coleta de plantas, tambÃm foram coletadas amostras de solo em duas profundidades, camada de 0 a 20 e de 20 a 40cm. Na qual foram submetidas Ã anÃlise de fertilidade. Para estimar a recomendaÃÃo de adubaÃÃo o sistema foi subdividido em: subsistema requerimento (REQ), que contempla a demanda de nutrientes pela planta, considerando a eficiÃncia de recuperaÃÃo dos nutrientes a serem aplicados, alÃm de uma dose que atende ao critÃrio de âsustentabilidadeâ e o subsistema suprimento (SUP), que corresponde Ã oferta de nutrientes pelo solo. ApÃs a determinaÃÃo do REQ total e SUP total, realizou -se o balanÃo nutricional, no qual se apresentar resultado positivo (REQ > SUP), recomenda-se a aplicaÃÃo de fertilizantes, e negativo ou nulo (REQ ≤ SUP), nÃo serÃ recomendado aplicar fertilizantes. O sistema estimou que o solo Ã capaz de suprir a demanda das plantas para P e Fe para todas as cultivares, no entanto, Ã necessÃrio que haja complementaÃÃo de adubaÃÃo nitrogenada, potÃssica. Assim como para os micronutrientes, o sistema estimou que hÃ necessidade de complementaÃÃo de adubaÃÃo, para Zn em todas as roseiras e Mn para as roseiras âTop secretâ e âAvalncheâ, no entanto com a recomendaÃÃo bem prÃximos a dose ideal, ou seja, igual a zero

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Barthelemy, Hélène. "Herbivores influence nutrient cycling and plant nutrient uptake : insights from tundra ecosystems." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-120191.

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Reindeer appear to have strong positive effects on plant productivity and nutrient cycling in strongly nutrient-limited ecosystems. While the direct effects of grazing on vegetation composition have been intensively studied, much less is known about the indirect effect of grazing on plant-soil interactions. This thesis investigated the indirect effects of ungulate grazing on arctic plant communities via soil nutrient availability and plant nutrient uptake. At high density, the deposition of dung alone increased plant productivity both in nutrient rich and nutrient poor tundra habitats without causing major changes in soil possesses. Plant community responses to dung addition was slow, with a delay of at least some years. By contrast, a 15N-urea tracer study revealed that nutrients from reindeer urine could be rapidly incorporated into arctic plant tissues. Soil and microbial N pools only sequestered small proportions of the tracer. This thesis therefore suggests a strong effect of dung and urine on plant productivity by directly providing nutrient-rich resources, rather than by stimulating soil microbial activities, N mineralization and ultimately increasing soil nutrient availability. Further, defoliation alone did not induce compensatory growth, but resulted in plants with higher nutrient contents. This grazing-induced increase in plant quality could drive the high N cycling in arctic secondary grasslands by providing litter of a better quality to the belowground system and thus increase organic matter decomposition and enhance soil nutrient availability. Finally, a 15N natural abundance study revealed that intense reindeer grazing influences how plants are taking up their nutrients and thus decreased plant N partitioning among coexisting plant species. Taken together these results demonstrate the central role of dung and urine and grazing-induced changes in plant quality for plant productivity. Soil nutrient concentrations alone do not reveal nutrient availability for plants since reindeer have a strong influence on how plants are taking up their nutrients. This thesis highlights that both direct and indirect effects of reindeer grazing are strong determinants of tundra ecosystem functioning. Therefore, their complex influence on the aboveground and belowground linkages should be integrated in future work on tundra ecosystem N dynamic.

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Visser, Saskia M. "Modelling nutrient erosion by wind and water in northern Burkina Faso /." Wageningen : Wageningen University and Research Centre, 2004. http://www.mannlib.cornell.edu/cgi-bin/toc.cgi?5046904.

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Sika, Makhosazana Princess. "Effect of biochar on chemistry, nutrient uptake and fertilizer mobility in sandy soil." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20272.

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Thesis (MScAgric)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Biochar is a carbon-rich solid material produced during pyrolysis, which is the thermal degradation of biomass under oxygen limited conditions. Biochar can be used as a soil amendment to increase the agronomic productivity of low potential soils. The aim of this study was to investigate the effect of applying locally-produced biochar on the fertility of low-nutrient holding, sandy soil from the Western Cape, and to determine the optimum biochar application level. Furthermore, this study investigates the effect of biochar on the leaching of an inorganic nitrogen fertilizer and a multi-element fertilizer from the sandy soil. The biochar used in this study was produced from pinewood sawmill waste using slow pyrolysis (450 °C). The soil used was a leached, acidic, sandy soil from Brackenfell, Western Cape. In the first study, the sandy soil mixed with five different levels of biochar (0, 0.05, 0.5, 0.5 and 10.0 % w/w) was chemically characterised. Total carbon and nitrogen, pH, CEC and plant-available nutrients and toxins were determined. The application of biochar resulted in a significant increase in soil pH, exchangeable basic cations, phosphorus and water holding capacity. A wheat pot trial using the biochar-amended soil was carried out for 12 weeks and to maturity (reached at 22 weeks). The trial was conducted with and without the addition of a water-soluble broad spectrum fertilizer. Results showed that biochar improved wheat biomass production when added at low levels. The optimum biochar application level in the wheat pot trial was 0.5 % (approximately 10 t ha-1 to a depth of 15 cm) for the fertilized treatments (21 % biomass increase), and 2.5 % (approximately 50 t ha-1 to a depth of 15 cm) for unfertilized treatments (29 % biomass increase). Since most biochars are alkaline and have a high C:N ratio, caution should be taken when applying it on poorly buffered sandy soil or without the addition of sufficient nitrogen to prevent nutrient deficiencies. In the second study, leaching columns packed with sandy soil and biochar (0, 0.5, 2.5 and 10.0 % w/w) were set up to determine the effect of biochar on inorganic nitrogen fertilizer leaching over a period of 6 weeks. It was found that biochar (0.5, 2.5, and 10.0 % w/w) significantly reduced the leaching of ammonium (12, 50 and 86 % respectively) and nitrate (26, 42 and 95 % respectively) fertilizer from the sandy soil. Moreover, biochar (0.5 %) significantly reduced the leaching of basic cations, phosphorus and certain micronutrients. This study demonstrated the potential of biochar as an amendment of acidic, sandy soils. Our findings suggest that an application rate of 10 t ha-1 should not be exceeded when applying biochar on these soils. Furthermore, biochar application can significantly reduce nutrient leaching in sandy agricultural soils.<br>AFRIKAANSE OPSOMMING: Biochar is ŉ koolstof-ryke, soliede materiaal geproduseer gedurende pirolise, wat die termiese degradasie van biomassa onder suurstof-beperkte omstandighede behels. Biochar kan gebruik word as ŉ grondverbeterings middel om die agronomiese produktiwiteit van grond te verhoog. Die doel van hierdie studie was om die effek van plaaslike vervaardigde biochar op die vrugbaarheid van die sanderige grond van die Wes-Kaap te ondersoek, en om die optimale biochar toedieningsvlak te bepaal. Verder, het hierdie studie die effek van biochar op die loging van anorganiese stikstof kunsmis en ‘n multi-elementkunsmis op sanderige grond ondersoek. Die biochar wat in hierdie studie gebruik is, is van dennehout saagmeul afval vervaardig d.m.v. stadige pirolise (450 °C). Die grond wat in hierdie studie gebruik is, is ‘n geloogde, suur, sanderige grond van Brackenfell, Wes-Kaap. In die eerste studie, is ‘n chemiesie ondersoek van die sanderige grond wat vermeng met is met vyf verskillende vlakke van biochar (0, 0.05, 0.5 en 10.0 % w/w) uitgevoer. Totale koolstof en stikstof, pH, KUK, en plant-beskikbare voedingstowwe en toksiene is in die grondmengsels bepaal. Die toediening van biochar het ‘n veroorsaak dat die grond pH, uitruilbare basiese katione, fosfor en waterhouvermoë beduidend toegeneem het. ‘n Koringpotproef was uitgevoer vir 12 weke en ook tot volwassenheid (wat op 22 weke bereik was) om die effek van die biochar op die sanderige grond teen die vyf verskillende toedieningsvlakke te bepaal. Daar was behandelings met en sonder die bykomstige toediening van ‘n wateroplosbare breë-spektrumkunsmis. Resultate toon dat die toediening van biochar teen lae vlakke koringbiomassa produksie verbeter. Die optimale biochar toedieningsvlak in die koringpotproef is 0.5 % (omtrent 10 t ha-1 tot ‘n diepte van 15 cm) vir die bemeste behandeling (21 % biomassa toename), en 2.5 % (omtrent 50 t ha-1 na ‘n diepte van 15 cm) vir onbemeste behandelings (29 % biomassa toename). Aangesien die meeste biochars alkalies is en ‘n hoë C:N verhouding besit, moet sorg gedra word wanneer dit op swak-gebufferde of lae N-houdende sanderige gronde toegedien word. Die resultate het aangedui dat die biochar versigtig aangewend moet word om grond oorbekalking te voorkom. In die tweede studie, was kolomme gepak met 2.0 kg van die sanderige grond gemeng met biochar (0, 0.05, 0.5, 2.5 en 10.0 % w/w) om die effek van biochar op die loging die anorganiese stikstof kunsmis oor ‘n tydperk van 6 weke om vas te stel. Daar is gevind dat biochar (0.5, 2.5 en 10.0 % w/w) die loging van ammonium (12, 50 en 86 % onderskeidelik) en nitraat (26, 42 en 95 % onderskeidelik) op sanderige grond aansienliek verminder. Verder, het biochar (0.5 %) die loging van basiese katione, fosfor en mikrovoedingstowwe aansienlik verminder. Hierdie studie het die potensiaal van biochar as verbeteringmiddel van suur, sanderige grond gedemonstreer. Ons bevindinge dui daarop aan dat ‘n toepassing vlak van 10 t ha-1 moet nie oorskry word nie wanneer biochar op hierdie gronde toegedien word. Die toediening van biochar op sanderige grond kan die loging van voedingstowwe aansienlik verlaag.

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Mills, Carolyn Lesley. "The nutrient economy of grazed grassland." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361226.

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Hassan, Khalida Abdul-Karim. "The effect of soil conditions on nutrient availability, nutrient uptake and productivity of spring wheat." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329590.

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Schofield, Hannah Kate. "A biogeochemical study of nutrient dynamics in artificial soil." Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/3766.

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Artificial soils have been employed within the Biomes of the Eden Project since its construction in 2000. Produced from sand, bark, composted green waste and lignite clay, these soils were designed to have their nutrient concentrations controlled through careful fertiliser applications. However, following variable environmental conditions, management practices and planting, the soils across the site are performing variably with regard to nutrient retention and storage. Experiments were conducted to assess the performances of an artificial soil in terms of nutrient cycling. This was carried out in three phases: Firstly, soils from the Humid Tropics and Outdoor biomes were sampled and examined, using a range of analytical techniques, to determine the nutrient characteristics of the established artificial soils from across the Eden Project site. This demonstrated that many of the nutrient concentrations of the artificial soils were consistent with those reported for naturally formed soils within comparable environments. All soil samples were of sandy loam texture (ISO 14688-1), with the sand-sized fraction representing > 50 % of the particle size composition. Statistical analyses suggested that management practices had a greater impact on the nutrient characteristics of artificial soils than environmental conditions. Secondly, an artificial soil was produced, following the Eden Project protocol, to examine its performance under controlled environmental conditions. This was packed into 4 columns (1 m height by 110 mm diameter), maintained at 15 ˚C and subjected to an irrigation regime for 52 weeks. Following 26 weeks of irrigation, 2 of the 4 columns were fertilised. Leachate was analysed for dissolved constituents as were solid samples of the fresh soil and of soil samples collected from the columns following 52 weeks irrigation. Leachate concentrations for all nutrients, excepting phosphate, were observed to decline over the irrigation period. Leached phosphate concentrations increased from weeks 0 to 2, and then remained relatively constant. Low nitrogen concentrations within the leachate from weeks 2 to 38 were caused by nitrogen immobilisation within the soil, whilst subsequent mineralisation resulted in increased concentrations from Week 38. Analyses of solid phase constituents determined little variation with depth. Fertiliser application demonstrated a significant (p < 0.05) increase in leachate concentrations for some dissolved organic nitrogen and nitrate, phosphate, magnesium and calcium and a decrease in pH. Fertiliser application observations showed less prominent differences for the extracted and solid phase constituents. Thirdly, biochar was applied to the artificial soil at three concentrations (10 %, 5 % and 2 %) plus a control (0 %), to determine whether biochar application may improve nutrient characteristics of artificial soils. The biochar amended soils were packed into mesocosms and maintained at 15 ˚C for 6 weeks. In general, leachate analyses demonstrated a decrease in nutrient losses to leaching with increasing biochar concentration, highlighting the potential for improved nutrient retention within the soils.

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Collins, Shane. "Residue composition influences nutrient release from crop residues." University of Western Australia. School of Earth and Geographical Sciences, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0171.

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[Truncated abstract] A greater adoption of stubble retention, minimum-till and no-till farming practices for the purposes of conserving soil, water and fertility requires a greater understanding of the complexity of physical and chemical interactions between the soil and crop residues. There is currently insufficient knowledge to allow reliable predictions of the effects of different residue types in different environments on soil fertility and crop growth, owing to the many residue characteristics and environmental interactions that have been shown to affect decomposition or nutrient release. The role of fibre and nutrient composition in nutrient release from crop residues, and implications for residue management techniques, were studied. Canola, lupin and field pea residues, obtained from farmland in Meckering and Northam, Western Australia, were separated into upper and basal stems, leaves, and siliques or pods. This was done to provide materials with a wide range of chemical and physical characteristics, and also allowed consideration of differential residue management of plant organs, such as comparing harvested canola siliques and retained canola stubble. Pre-treatment by chopping and/or humidification was applied to residues to provide some information about the processes of nutrient release. Residues were subjected to simulated rainfall to assess nutrient leaching from plant material, and placed on soil in pots in constant-temperature glasshouse conditions to assess decomposition. Amounts and rates of change of residue fibre and nutrients were determined throughout leaching and decomposition. Energy Dispersive X-ray (EDX) microanalysis was used to assess the location of diffusible ions in air-dried residues and the effects of humidification on nutrient positioning and release. ... However, the release of calcium and magnesium depended on the decomposition of the more recalcitrant components such as cellulose and lignin, as supported by microscopy results showing changes in nutrient distribution following humidification. The proportionality of amounts of calcium and magnesium leached and released during decomposition is likely to suggest a similarity of chemical form more than similarity of function or position of the two elements. Management of crop residues for maximising and optimising the timing of release of different nutrients will need to take into account the placement of different plant types and parts, particle sizes distribution and pre-treatment of material to efficiently manage short- and long-term soil fertility to sustain crops, particularly on degraded soils. Significant nutrient release of potassium, sulphur and magnesium from crop residues can be achieved from surface placement, with the release of potassium and sulphur managed by modifying residue particle size through appropriate harvesting, ploughing or sowing implement selection. High nutrient uptake crops and plant parts where they can be economically viable to grow or separated by the harvesting technique are particularly valuable as sources of nutrients and soil organic matter.

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Più fonti

Libri sul tema "Soil nutrient"

Sikkim (India). Food Security & Agriculture Development Department, ed. Soil nutrient mapping of Sikkim. Nagpur, [India]: ICAR-National Bureau of Soil Survey and Land Use Planning, 2016.

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K, Soon Y., ed. Soil nutrient availability: Chemistry and concepts. New York, N.Y: Van Nostrand Reinhold, 1985.

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John, Havlin, Jacobsen Jeffrey S, American Society of Agronomy, and Soil Science Society of America., eds. Soil testing: Prospects for improving nutrient recommendations. Madison, Wis., USA: Soil Science Society of America, 1994.

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Nair, Kodoth Prabhakaran. Thermodynamics of Soil Nutrient Bioavailability. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-76817-1.

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Barber, Stanley A. Soil nutrient bioavailability: A mechanistic approach. 2nd ed. New York: Wiley, 1995.

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1944-, Roy R. N., and Food and Agriculture Organization of the United Nations., eds. Assessment of soil nutrient balance: Approaches and methodologies. Rome: Food and Agriculture Organization of the United Nations, 2003.

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Koch, Marguerite S. Soil and surface water nutrients in the Everglades nutrient removal project. West Palm Beach: Environmental Sciences Division, Research and Evaluation Dept., South Florida Water Management District, 1991.

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Ballard, T. M. Evaluating forest stand nutrient status. Victoria, B.C: Information Services Branch, Ministry of Forests, 1986.

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Mahler, Robert Louis. Current nutrient status of soils in Idaho, Oregon and Washington. [Corvallis, Or.]: University of Idaho Cooperative Extension Service, Washington State University Cooperative Extension Service, Oregon State University Cooperative Extension Service, and U.S. Dept. of Agriculture, 1985.

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P, Bernhart Alfred. Evapotranspiration nutrient uptake soilinfiltration of effluent water. Toronto, Can: A.P. Bernhart, 1985.

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Più fonti

Capitoli di libri sul tema "Soil nutrient"

Wallander, Håkan. "The Nutrient Cycle." In Soil, 79–100. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08458-9_5.

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Arbestain, M. Camps, F. Macías, W. Chesworth, Ward Chesworth, Otto Spaargaren, Johnson Semoka, and Konrad Mengel. "Nutrient Potentials." In Encyclopedia of Soil Science, 494–500. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-3995-9_386.

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Binkley, Dan, and Peter Vitousek. "Soil nutrient availability." In Plant Physiological Ecology, 75–96. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-9013-1_5.

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Binkley, Dan, and Peter Vitousek. "Soil nutrient availability." In Plant Physiological Ecology, 75–96. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2221-1_5.

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Reetsch, Anika, Didas Kimaro, Karl-Heinz Feger, and Kai Schwärzel. "Traditional and Adapted Composting Practices Applied in Smallholder Banana-Coffee-Based Farming Systems: Case Studies from Kagera and Morogoro Regions, Tanzania." In Organic Waste Composting through Nexus Thinking, 165–84. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36283-6_8.

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AbstractIn Tanzania, about 90% of the banana-coffee-based farming systems lie in the hands of smallholder farmer families. In these systems, smallholder farmers traditionally add farm waste to crop fields, making soils rich in organic matter (humus) and plant-available nutrients. Correspondingly, soils remained fertile during cultivation for over a century. Since the 1960s, the increasing demand for food and biofuels of a growing population has resulted in an overuse of these farming systems, which has occurred in tandem with deforestation, omitted fallows, declined farm size, and soil erosion. Hence, humus and nutrient contents in soils have decreased and soils gradually degraded. Inadequate use of farm waste has led to a further reduction in soil fertility, as less organic material is added to the soils for nutrient supply than is removed during harvesting. Acknowledging that the traditional use of farm waste successfully built up soil fertility over a century and has been reduced in only a few decades, we argue that traditional composting practices can play a key role in rebuilding soil fertility, if such practices are adapted to face the modern challenges. In this chapter, we discuss two cases in Tanzania: one on the traditional use of compost in the Kagera region (Great African Rift Valley) and another about adapted practices to produce compost manure in the Morogoro region (Uluguru Mountains). Both cases refer to rainfed, smallholder banana-coffee-based farming systems. To conclude, optimised composting practices enable the replenishment of soil nutrients, increase the capacity of soils to store plant-available nutrients and water and thus, enhance soil fertility and food production in degraded banana-coffee-based farming systems. We further conclude that future research is needed on a) nutrient cycling in farms implementing different composting practices and on b) socio-economic analyses of farm households that do not successfully restore soil fertility through composting.

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Majumdar, Kaushik, Robert M. Norton, T. Scott Murrell, Fernando García, Shamie Zingore, Luís Ignácio Prochnow, Mirasol Pampolino, et al. "Assessing Potassium Mass Balances in Different Countries and Scales." In Improving Potassium Recommendations for Agricultural Crops, 283–340. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59197-7_11.

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AbstractEstimating nutrient mass balances using information on nutrient additions and removals generates useful, practical information on the nutrient status of a soil or area. A negative input–output balance of nutrients in the soil results when the crop nutrient removal and nutrient losses to other sinks become higher than the nutrient inputs into the system. Potassium (K) input–output balance varies among regions that have different climates, soil types, cropping systems, and cropping intensity. This chapter illustrates the farm-gate K balances in major production areas of the world and their impacts on native K fertility and crop yields. On-farm and on-station research examples show significant negative K balances in South Asia and Sub-Saharan Africa, while China, the USA, Brazil, and countries of the Latin America Southern Cone highlighted continued requirement of location-specific K application to maintain crop yields and soil K fertility status at optimum levels.

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Murrell, T. Scott. "Measuring Nutrient Removal, Calculating Nutrient Budgets." In Soil Science Step-by-Step Field Analysis, 159–82. Madison, WI, USA: American Society of Agronomy and Soil Science Society of America, 2015. http://dx.doi.org/10.2136/2008.soilsciencestepbystep.c13.

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Mukherjee, Swapna. "Chemistry of Soil Nutrient." In Current Topics in Soil Science, 165–82. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92669-4_16.

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Sharma, Neha, Anchal Chaudhary, Nikhil Sharma, Smriti Shukla, Naveen Chandra Joshi, Kanchan Vishwakarma, Prashant Kumar Singh, and Arti Mishra. "Plant Nutrient Requirements and Nutrient Homeostasis in Plants." In Soil Health and Nutrition Management, 1–20. GB: CABI, 2025. https://doi.org/10.1079/9781800624597.0001.

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Mitra, Sisir. "Plant nutrition and irrigation." In Guava: botany, production and uses, 148–71. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789247022.0007.

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Abstract This chapter focuses on plant nutrition and irrigation in guava production. Information is given on soil, salinity, nutrient uptake, role of nutrients, fertilizer rate and time of application, foliar application, integrated nutrient management, tissue analysis, organic production, water management, and fertigation.

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Atti di convegni sul tema "Soil nutrient"

Mathew, Gigi Annee, Varsha Jotwani, and A. K. Singh. "Fuzzy Logic based Soil Nutrient Categorization System for Decision Making in Soil Nutrient Mitigation." In 2025 IEEE 14th International Conference on Communication Systems and Network Technologies (CSNT), 765–69. IEEE, 2025. https://doi.org/10.1109/csnt64827.2025.10968282.

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S, Kabilan, Gunapriya D, Ragavi Sri S, Shivagurunathan A, and Thalagandasamy N. "IOT-Based Soil Nutrient Monitoring Decision System." In 2024 10th International Conference on Advanced Computing and Communication Systems (ICACCS), 2297–301. IEEE, 2024. http://dx.doi.org/10.1109/icaccs60874.2024.10716909.

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Sushma, Yarra, CH Jaya Lakshmi, Karra Rajesh, Vanamala Hemanth, and Ventrapragada Sowmyarao. "IoT Based Soil Nutrient Monitoring and Analysis System." In 2024 International Conference on IoT Based Control Networks and Intelligent Systems (ICICNIS), 348–53. IEEE, 2024. https://doi.org/10.1109/icicnis64247.2024.10823219.

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Chen, Hang, Yu Feng, Huirong Chen, Guifen Chen, and Liying Cao. "Research on Soil Nutrient Inversion in Black Soil Areas Based on Neural Networks." In 2024 3rd International Conference on Artificial Intelligence and Autonomous Robot Systems (AIARS), 836–43. IEEE, 2024. http://dx.doi.org/10.1109/aiars63200.2024.00157.

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Sisodia, Ms Shivani, and Saurabh Dhyani. "A review for soil nutrient identification using image processing." In 2024 1st International Conference on Advances in Computing, Communication and Networking (ICAC2N), 1352–56. IEEE, 2024. https://doi.org/10.1109/icac2n63387.2024.10895848.

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Dattatreya, Sneha, Manoj Sain, Archit Khurana, K. Jena, and Gaurav Chatterjee. "Enhanced Soil Nutrient-NPK Measurement Using Electrical Conductivity and Temperature." In 2024 International Conference on Communication, Control, and Intelligent Systems (CCIS), 1–6. IEEE, 2024. https://doi.org/10.1109/ccis63231.2024.10931890.

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D., Smitha Gayathri, Arpitha Kulkarni, Subodh Kumar Panda, Rachana R, Shreesh, and Keerthana Keerthana. "Soil Nutrient Prediction and Crop Recommendation System: Conventional to Modern Methods of Soil NPK Sensing." In 2025 International Conference on Intelligent and Innovative Technologies in Computing, Electrical and Electronics (IITCEE), 1–5. IEEE, 2025. https://doi.org/10.1109/iitcee64140.2025.10915247.

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Agrawal, Gautam, Akankhya Panda, Debaprita Panda, Geetika Subudhi, Satyabhama Dash, and Naresh Chandra Naik. "AGRIBOT:A Mobile Sensing Robot for Nutrient and Moisture Concentration of Soil." In 2024 IEEE 4th International Conference on Applied Electromagnetics, Signal Processing, & Communication (AESPC), 1–4. IEEE, 2024. https://doi.org/10.1109/aespc63931.2024.10872080.

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Mishra, Amit, Jeevesh Dass, Siddhant Saxena, Ishan Satya Prakash, Sargun, Arshia Garg, Karun Verma, and Jhilik Bhattacharya. "Data-Driven Cloud Based Soil Nutrient Prediction System for Precision Agriculture." In 2024 International Conference on Modeling, Simulation & Intelligent Computing (MoSICom), 308–13. IEEE, 2024. https://doi.org/10.1109/mosicom63082.2024.10881174.

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Adhikary, Rahul, Vemu Sudham, and Swaroop Sualsingh. "Real-Time Soil Nutrient Monitoring Using NPK Sensors: Enhancing Precision Agriculture." In 2024 2nd International Conference on Signal Processing, Communication, Power and Embedded System (SCOPES), 1–4. IEEE, 2024. https://doi.org/10.1109/scopes64467.2024.10991026.

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Rapporti di organizzazioni sul tema "Soil nutrient"

Dhakal, Rajendra, Shankar Neupane, Pragati Sipkhan, Kailash Bhatta, Oshin Sharma, and Ram Dev Shah. Vermiwash: A Low-Cost and Eco-Friendly Liquid Fertilizer. International Centre for Integrated Mountain Development (ICIMOD), September 2024. https://doi.org/10.53055/icimod.1075.

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The excessive use of chemical fertilizers in Nepalese agriculture threatens crop production and environmental health, adversely impacting soil, water quality, and human health. In this context, vermiwash emerges as an effective, cost-efficient, and organic alternative. Derived from the interaction of water with earthworms and organic waste, vermiwash serves as a nutrient-rich liquid fertilizer that enhances soil health, promotes plant growth, and boosts crop yields. The process of making vermiwash involves a double filtration system, where organic materials, cattle dung, and earthworms are used to produce a liquid rich in essential nutrients and beneficial microorganisms. The nutrient composition of vermiwash is beneficial for various crops, including cauliflower, tomatoes, and leafy greens.

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Strand, Allan. Effects of fine-root senescence upon soil communities and nutrient flux into soil pools (Final Report). Office of Scientific and Technical Information (OSTI), January 2022. http://dx.doi.org/10.2172/1841430.

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Schumacher, Shannon. Effects of Over Application of Soil Ammendments and Nutrient Use Efficiency. Ames (Iowa): Iowa State University, May 2023. http://dx.doi.org/10.31274/cc-20240624-600.

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McFarlane, Aaron, Nia Hurst, Carina Jung, and Charles Theiling. Evaluating soil conditions to inform Upper Mississippi River floodplain restoration projects. Engineer Research and Development Center (U.S.), April 2024. http://dx.doi.org/10.21079/11681/48451.

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The US Army Corps of Engineers (USACE) has designed and constructed thousands of acres of ecosystem restoration features within the Upper Mississippi River System. Many of these projects incorporate island construction to restore geomorphic diversity and habitat, including floodplain forests. Soils are the foundation of the ecological function and successful establishment of floodplain forests as they are the basis through which plants obtain water and nutrients and provide critical ecosystem services. To improve floodplain forest island restoration outcomes, three natural and four recently (<10 years) constructed restoration sites were studied to compare soil physical, chemical, microbial, and fungal characteristics. Constructed islands had lower soil organic matter and dissolved organic carbon and differed in nutrient concentrations, bacterial assemblages, and fungal communities compared to reference sites. However, soil enzyme activity and some microbial community characteristics were functionally similar between the natural and created sites. Results align with previously established restoration trajectory theories where hydrological and basic microbial ecosystem functions are restored almost immediately, but complex biologically mediated and habitat functions require more time to establish. Data from this and future studies will help increase the long-term success of USACE floodplain forest restoration, improve island design, and help develop region-specific restoration trajectory curves to better anticipate the outcomes of floodplain forest creation projects.

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Cusack, Daniela, Benjamin Turner, S. Wright, and Lee Dietterich. Consequences of Altered Root Nutrient Uptake for Soil Carbon Stabilization (Final Report). Office of Scientific and Technical Information (OSTI), February 2021. http://dx.doi.org/10.2172/1763927.

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Busby, Ryan, H. Torbert, and Stephen Prior. Soil and vegetation responses to amendment with pulverized classified paper waste. Engineer Research and Development Center (U.S.), May 2022. http://dx.doi.org/10.21079/11681/44202.

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The United States Army produces a significant amount of classified paper waste that is pulverized to a fine consistency unsuitable for recycling. However, cheap, high quality organic materials such as classified paper waste are useful as soil amendments. The objective of this research was to evaluate the utilization of pulverized classified paper waste as a soil amendment to improve soil health and increase establishment of desirable native grasses on degraded Army training lands. Paper was applied at rates of 9 to 72 Mg ha⁻¹ to two soil types at Fort Polk, LA: an alfisol (very fine sandy loam - Fine, smectitic, thermic Chromic Vertic Hapludalfs) and an ultisol (loamy fine sandy - Loamy, siliceous, semiactive, thermic Arenic Paleudults). These are common soil orders found on military training lands nationwide and represent fertile (alfisol) and unfertile (ulitsol) soils. Vegetation and soils were monitored over 2 growing seasons. No increase in heavy metals were observed in soils. Extensive analysis showed very low levels of regulated contaminants in the paper, but most were below detection limits. The ultisol site showed improved soil physical and chemical properties, while desirable vegetation benefitted from nutrient immobilization at the alfisol site. Based on the results of this study, applying pulverized paper waste to soil at a rate of 35.9 Mg ha⁻¹ is recommended. Application of paper waste to soils had no adverse environmental effects, improved soil physiochemical properties, and facilitated establishment of desirable native vegetation.

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Abay, Kibrom A., Mehari Hiluf Abay, Mulubrhan Amare, Guush Berhane, and Ermias Betemariam. Mismatch between soil nutrient requirements and fertilizer applications: Implications for yield responses in Ethiopia. Washington, DC: International Food Policy Research Institute, 2021. http://dx.doi.org/10.2499/p15738coll2.134449.

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Alvez, Juan, James Cropper, Lynn Knight, Ed Rayburn, Howard Skinner, Kathy Soder, and Mike Westendorf. Managing Grazing to Improve Climate Resilience. USDA Northeast Climate Hub, February 2017. http://dx.doi.org/10.32747/2017.6956540.ch.

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Heavy rain events have increased dramatically in the Northeastern United States. These downpours are causing more soil erosion and nutrient runoff. Increasing summer temperatures may also amplify plant stress and limit productivity.

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Bjorkman, Thomas, Michel Cavigelli, Dan Dostie, Joshua Faulkner, Lynn Knight, Steven Mirsky, and Brandon Smith. Cover Cropping to Improve Climate Resilience. USDA Northeast Climate Hub, February 2017. http://dx.doi.org/10.32747/2017.6956539.ch.

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Abstract (sommario):

Heavy rains are becoming more frequent across the Northeastern United States and increasing soil erosion and nutrient runoff problems. Wetter weather in the spring and fall is reducing the number of days that fields can be worked.

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Comerford, N. B. Diagnosis and correction of soil nutrient limitations in intensively managed Southern pine forests. Quarterly report, October-December 1999. Office of Scientific and Technical Information (OSTI), January 2000. http://dx.doi.org/10.2172/759444.

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