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Artykuły w czasopismach na temat „Deep-placed fertiliser”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 12 lutego 2022

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1

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 st

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Yang, Z. P., D. A. Turner, J. J. Zhang, Y. L. Wang, M. C. Chen, Q. Zhang, O. T. Denmead, D. Chen, and J. R. Freney. "Loss of nitrogen by ammonia volatilisation and denitrification after application of urea to maize in Shanxi Province, China." Soil Research 49, no. 5 (2011): 462. http://dx.doi.org/10.1071/sr11107.

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Much of the fertiliser nitrogen (N) used in agriculture is lost to the atmosphere as nitric oxide and nitrogen dioxide (collectively referred to as NOx), ammonia (NH3), and nitrous oxide (N2O). The lost N is not only an economic problem for the farmer; it also contaminates the environment and affects human health. Because the values obtained for NOx and NH3 loss to the atmosphere from agriculture in Monsoon Asia have been questioned, we quantitatively determined, using new techniques, the emission of these gases from a maize crop fertilised with urea in northern China. The fertiliser was deep-

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Bolland, M. D. A., and R. F. Brennan. "Phosphorus, copper and zinc requirements of no-till wheat crops and methods of collecting soil samples for soil testing." Australian Journal of Experimental Agriculture 46, no. 8 (2006): 1051. http://dx.doi.org/10.1071/ea05024.

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Plant testing of wheat crops in south-western Australia, sown using no-till for >7 years, often indicates marginal to deficient levels of the soil immobile elements phosphorus (P), copper (Cu) and zinc (Zn). In this region, P, Cu and Zn fertilisers are usually placed (drilled) with the seed while sowing crops. However, in no-till cropping, because the fertilisers are placed in the same rows as the seed during sowing, in the years after application the 3 elements are no longer mixed through the top 10 cm of soil. It may be more effective to deep band fertiliser below seed while sowing no-til

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4

Scott, B. J., D. J. Carpenter, B. D. Braysher, B. R. Cullis, and C. M. Evans. "Phosphorus fertiliser placement for lupins in southern New South Wales." Australian Journal of Experimental Agriculture 43, no. 1 (2003): 79. http://dx.doi.org/10.1071/ea01201.

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Research in Western Australia and South Australia indicated that fertiliser phosphorus (P) banded below the seed of narrow leaf lupin (Lupinus angustifolius L.) at sowing was a more effective method of applying P�fertiliser than the usual placement of P with the seed. This technology has not been investigated in southern New South Wales where lupins have been known to be unresponsive to fertiliser P.We conducted 4 field experiments to examine the effect on lupin yield of applying 6 rates of P (0, 5, 10, 15, 20 and 40 kg/ha) either by placement with or below the seed. To further test responsive

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5

Gaudin, Rémi. "The kinetics of ammonia disappearance from deep-placed urea supergranules (USG) in transplanted rice: the effects of split USG application and PK fertiliser." Paddy and Water Environment 10, no. 1 (January 11, 2011): 1–5. http://dx.doi.org/10.1007/s10333-011-0249-3.

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Blackshaw, R. E., G. Semach, X. Li, J. T. O'Donovan, and K. N. Harker. "Tillage, fertiliser and glyphosate timing effects on foxtail barley (Hordeum jubatum) management in wheat." Canadian Journal of Plant Science 80, no. 3 (July 1, 2000): 655–60. http://dx.doi.org/10.4141/p99-132.

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Foxtail barley (Hordeum jubatum L.) is becoming a more severe weed problem as conservation tillage becomes widely adopted on the southern Canadian prairies. A 5-yr field study was conducted to determine the combined effects of tillage, N rate, N placement and application timing of glyphosate to manage foxtail barley in spring wheat. Wide-blade tillage conducted in fall and spring, compared to zero-till, reduced foxtail barley biomass and seed production in all yr and increased wheat yield in 4 of 5 yr. Foxtail barley was highly competitive with wheat for added N. N fertiliser placed mid-row in

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7

Radford, BJ, WM Strong, and GB Wilderminth. "Effects of urea and flutriafol on germination, coleptile length and establishment of wheat and barley." Australian Journal of Experimental Agriculture 29, no. 4 (1989): 551. http://dx.doi.org/10.1071/ea9890551.

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Laboratory and field experiments were conducted to determine the effects of urea fertiliser placed with the seed and flutriafol fungicide seed dressing on germination, coleoptile length and establishment of wheat (cvv. Bass and Hartog) and barley (cv. Grimmett). Interactions with depth of sowing and press wheel pressure were also measured in the field. Placement of urea (1 and 2 g/m) with the seed reduced germination, final coleoptile length and field establishment at 2 seeding depths (40 and 75 mm) and delayed field emergence. Flutriafol (0.025 or 0.1 g/kg seed) had no effect on laboratory ge

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8

Singh, R. K., R. De, and B. B. Turkhede. "Effect of fertilizer placement and row arrangements on the yield of two varieties of wheat grown under dryland conditions." Journal of Agricultural Science 107, no. 1 (August 1986): 113–18. http://dx.doi.org/10.1017/s0021859600066855.

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SUMMARYExperiments made under dryland conditions in the post-monsoon period for 3 years showed that deep placement of N and P fertilizers at 12 or 18 cm led to better utilization than their shallow placement at 6 cm. Grain yield was maximal when the fertilizer was placed at 18 cm depth. The yield increase by deep fertilizer placement resulted from higher tiller survival till harvest. In these treatments water use efficiency and mineralizable N content in soil were higher.Of the two varieties tested the taller cultivar (C 306) yielded more in normal years but lodging due to a severe storm in on

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9

Chaitep, W., RDB Lefroy, and GJ Blair. "Effect of placement and source of sulfur in flooded and non-flooded rice cropping systems." Australian Journal of Agricultural Research 45, no. 7 (1994): 1547. http://dx.doi.org/10.1071/ar9941547.

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Many rice-growing areas in developing countries are becoming S deficient. A glasshouse experiment was conducted to study the effect of water regimes in successive crops (nonflooded : non-flooded, flooded : flooded and flooded : non-flooded), surface (S) and deep (D) placement of sulfur fertilizer and S sources (elemental S (E) and sulfate S (S)) on the growth of rice. A soil of granitic origin was used and 35S-labelled sulfur fertilizers were used to investigate S uptake by plants and the dynamics of S in soils. Among the sulfur sources, surface-applied gypsum produced the highest total yield,

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10

Kraska, Piotr, Sylwia Andruszczak, Paweł Gierasimiuk, and Hubert Rusecki. "The Effect of Subsurface Placement of Mineral Fertilizer on Some Soil Properties under Reduced Tillage Soybean Cultivation." Agronomy 11, no. 5 (April 28, 2021): 859. http://dx.doi.org/10.3390/agronomy11050859.

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One of the adverse effects of no-tillage is the accumulation of nutrients (in particular P and K) in the top soil layer. The subsurface application of mineral fertilizers at a depth of 10–30 cm can reduce this phenomenon and at the same time provide a relatively uniform access to soil nutrients for plant roots. Such a method of mineral fertilizer application can additionally decrease the environmental risk associated with water eutrophication because the water runoff from fields, where the soil P content is high, is reduced. The aim of this research was to evaluate the effect of the subsurface

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11

Smychenko, V. M., and M. M. Miroshnychenko. "Impact of the depth of fertilizer localization on the nutrient regime of Luvic Chernic Phaozem and yield of spring barley." Agrochemistry and Soil Science, no. 91 (August 2021): 22–30. http://dx.doi.org/10.31073/acss91-03.

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The purpose of the research is to determine the impact of the depth of local application of mineral fertilizers on the nutrient content in the arable layer of soil and the yield of spring barley. The studies were carried out during 2018 - 2020 in a temporary small-plot experiment. Soil – chernozem podzolized loamy (Luvic Chernic Phaeozem). The application of N60P60K60 in the form of nitroammophoska or a mixture of ammophos, ammonium nitrate and potassium chloride was compared to a depth of 10-12 cm and 20-22 cm from the soil surface. The row spacing of barley crops was 15 cm; the fertilizer ta

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12

NUTTALL, W. F., and R. G. BUTTON. "THE EFFECT OF DEEP BANDING N AND P FERTILIZER ON THE YIELD OF CANOLA (Brassica napus L.) AND SPRING WHEAT (Triticum aestivum L.)." Canadian Journal of Soil Science 70, no. 4 (November 1, 1990): 629–39. http://dx.doi.org/10.4141/cjss90-066.

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This study was conducted to determine if deep banding of P fertilizer was as efficient as placing P in a band with the seed. Phosphorus fertilizer (MAP) was deep banded at rates of 0, 10, 20, and 30 kg of P ha−1 which was compared with equal rates applied with the seed, and with one-half seed placed, one-half deep banded. The P rates were applied onto the same plots each year in a cropping sequence of canola (Brassica napus L.), four crops of wheat (Triticum aestivum L.) and then canola. Plots were located on a Melfort silty clay soil (Orthic Black Chernozem). In combination with MAP treatment

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13

Santos, Wedisson Oliveira, Priscila Maria de Aquino, Rafael Lucas Coca Cuesta, Isabela Maísa Honorato Saldanha, Edson Marcio Mattiello, and Leonardus Vergütz. "Zinc Diffusion and Availability Affected by Different Sources in Soils of Contrasting Textures." Journal of Agricultural Science 11, no. 5 (April 15, 2019): 259. http://dx.doi.org/10.5539/jas.v11n5p259.

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Trends in new fertilizer technologies should balance the nutrient release rate from fertilizers with plant demands over time, while developing suitable physical characteristics of the fertilizer&rsquo;s particles. The objective of this study was to evaluate the performance of three zinc fertilizers [ZnO, ZnSO4, and a commercial co-granulated ZnO+S0 fertilizer (ES_Zn)] on Zn diffusion in soil and their agronomic performances. A Petri dish trial was carried out in order to evaluate the diffusion of Zn in the soil. The experiment was designed as a factorial scheme (3 + 1) &times; 2 &t

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14

Kargbo, M. B., Shenggang Pan, Zhaowen Mo, Zaiman Wang, Xiwen Luo, Hua Tian, Md Faruque Hossain, Umair Ashraf, and Xiangru Tang. "Physiological Basis of Improved Performance of Super Rice (Oryza sativa) to Deep Placed Fertilizer with Precision Hill-drilling Machine." International Journal of Agriculture and Biology 18, no. 04 (July 1, 2016): 797–804. http://dx.doi.org/10.17957/ijab/15.0173.

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15

Medina, L. Carolina, Thomas A. Obreza, Jerry B. Sartain, and Robert E. Rouse. "Nitrogen Release Patterns of a Mixed Controlled-release Fertilizer and Its Components." HortTechnology 18, no. 3 (January 2008): 475–80. http://dx.doi.org/10.21273/horttech.18.3.475.

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Applying water-soluble nitrogen (N) fertilizer to Florida citrus (Citrus spp.) trees on deep sandy soils may lead to poor nutrient use efficiency and possible nitrate contamination of groundwater if rainfall or irrigation is excessive. Controlled-release fertilizer (CRF) is a possible alternative to increase N uptake efficiency and minimize losses to the environment, but current grower acceptance is limited as a result of lack of experience with CRF performance and its high relative cost. The objective of this study was to measure the N release characteristics of a CRF blend (CitriBlen®) desig

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16

SCHULZ, R., T. MAKARY, S. HUBERT, K. HARTUNG, S. GRUBER, S. DONATH, J. DÖHLER, et al. "Is it necessary to split nitrogen fertilization for winter wheat? On-farm research on Luvisols in South-West Germany." Journal of Agricultural Science 153, no. 4 (May 1, 2014): 575–87. http://dx.doi.org/10.1017/s0021859614000288.

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SUMMARYMineral nitrogen (N) fertilization in cereals is commonly split into three or four applications. In order to simplify N fertilization, a single N application either broadcast or placed on the soil surface was compared to conventionally split fertilization for winter wheat (Triticum aestivum L.). The 4-year experiment (2007–2010) was performed using a participatory approach on farmers’ fields on deep loamy soils (Luvisols) in South-West Germany.Grain yield and crude protein contents differed only slightly or not at all between treatments including different N fertilizer types (calcium am

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17

Islam, MR, MP Akhter, A. Huda, MA Hashem, and MA Asad. "Forms and Placement of Nitrogen Fertilizers Influence Nitrogen Use Efficiency and Yield of BRRI Dhan49 under Continuous Flooded Condition." Journal of Environmental Science and Natural Resources 11, no. 1-2 (September 30, 2019): 53–58. http://dx.doi.org/10.3329/jesnr.v11i1-2.43366.

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An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during Aman season of 2016 to evaluate the effects of deep placement of N fertilizers in the form of USG and NPK briquettes in comparison with PU on nitrogen use efficiency and yield of BRRI dhan49. The soil was silt loam in texture having pH 6.27, organic matter content 1.95% and total N 0.136%. The experiment was laid out in a RCBD with eight treatments and three replications. The PU was applied in three equal splits. The USG and NPK briquettes were deep placed at 10 DAT and the

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18

Malhi, S. S., and K. S. Gill. "Placement, rate and source of N, seedrow opener and seeding depth effects on canola production." Canadian Journal of Plant Science 84, no. 3 (July 1, 2004): 719–29. http://dx.doi.org/10.4141/p03-174.

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Seedrow-placement of N fertilizer can save money and time, but it can cause reduced emergence and yield. From 1998 to 2000, a field experiment was conducted on a silty clay loam (Black Chernozem) soil at Melfort, Saskatchewan. The objectives were to determine the influence of placement, rate and source of N, seedrow opener and seeding depth on the emergence, yield, N uptake, and seed protein and oil content of canola (Brassica napus L. ‘Quest’). The treatments were optimum (1.5 cm) and deep (4.5 cm) seeding depths in two main plots with 17 subplots of different combinations of N sources [urea

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19

Broschat, Timothy K. "Rates of Ammonium-nitrogen, Nitrate-nitrogen, Phosphorus, and Potassium from Two Controlled-release Fertilizers under Different Substrate Environments." HortTechnology 15, no. 2 (January 2005): 332–35. http://dx.doi.org/10.21273/horttech.15.2.0332.

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Five-gram (0.18 oz) samples of two controlled-release fertilizers (CRFs), Osmocote 15N–3.9P–10K (8–9 month) (OSM) and Nutricote 18N–2.6P–6.7K (type 180) (NUTR), were sealed into polypropylene mesh packets that were placed on the surface of a 5 pine bark: 4 sedge peat: 1 sand (by volume) potting substrate (PS), buried 10 cm (3.9 inches) deep below the surface of PS, buried 10 cm below the surface of saturated silica sand (SS), or in a container of deionized water only. Containers with PS received 120 mL (4.1 floz) of deionized water three times per week, but the containers with SS or water only

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Blackshaw, Robert E., Louis J. Molnar, and H. Henry Janzen. "Nitrogen fertilizer timing and application method affect weed growth and competition with spring wheat." Weed Science 52, no. 4 (August 2004): 614–22. http://dx.doi.org/10.1614/ws-03-104r.

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Managing crop fertilization may be an important component of integrated weed management systems that protect crop yield and reduce weed populations over time. A field study was conducted to determine the effects of various timings and application methods of nitrogen (N) fertilizer on weed growth and spring wheat yield. Nitrogen fertilizer was applied the previous fall (October) or at planting (May) at a dose of 50 kg ha−1. Nitrogen application treatments consisted of granular ammonium nitrate applied broadcast on the soil surface, banded 10 cm deep between every crop row, banded 10 cm deep bet

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21

Karamanos, R. E., J. T. Harapiak, and N. A. Flore. "Long-term effect of placement of fertilizer nitrogen and phosphorus on barley yields." Canadian Journal of Plant Science 88, no. 2 (April 1, 2008): 285–90. http://dx.doi.org/10.4141/cjps07138.

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An experiment that was established in 1990 to assess depth and method of placement of nitrogen (N) and phosphorus (P) fertilizer on the yield of continuous barley (with 1 yr interruption with canola in 1995) was continued to 2001. Annually, 80 kg N ha-1 were banded either at 7.5 to 10 or 15 to 17.5 cm depth alone or in combination with 40 kg P2O5 ha-1; the latter was either seedrow placed or banded with the N (dual banding), or split 1/2 in the seedrow and 1/2 in the band. An unfertilized control was maintained in all years. Temperature after seeding had a marked effect on the effectiveness of

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Alam, Md, Richard Bell, Nazmus Salahin, Shahab Pathan, A. T. M. A. I. Mondol, M. J. Alam, M. H. Rashid, P. L. C. Paul, M. I. Hossain, and N. C. Shil. "Banding of Fertilizer Improves Phosphorus Acquisition and Yield of Zero Tillage Maize by Concentrating Phosphorus in Surface Soil." Sustainability 10, no. 9 (September 10, 2018): 3234. http://dx.doi.org/10.3390/su10093234.

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Zero tillage increases stratification of immobile nutrients such as P. However, it is unclear whether near-surface stratification of soil P eases or hampers P uptake by maize (Zea mays L.) which needs an optimum P supply at/before six–leaf–stage to achieve potential grain yield. The aim of the three-year study was to determine whether P stratification, under zero tillage, impaired yield of maize and which P placement methods could improve P uptake on an Aeric Albaquept soil subgroup. Phosphorus fertilizer was placed by: (a) broadcasting before final tillage and sowing of seeds; (b) surface ban

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WIDMER, CHAD L. "The hydroid and early medusa stages of the deep sea jellyfish Earleria purpurea (Hydrozoa: Mitrocomidae) from the Monterey Bay Submarine Canyon, USA." Zootaxa 2902, no. 1 (June 1, 2011): 59. http://dx.doi.org/10.11646/zootaxa.2902.1.3.

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The hydroid and early medusa stages of the deep sea hydrozoan jellyfish Earleria purpurea (Hydrozoa: Mitrocomidae) are described. Mature medusae were collected from the Monterey Bay submarine canyon near Monterey, California, USA utilizing a remotely operated vehicle and returned to the laboratory for culturing. In vitro fertilized eggs developed into free-swimming planulae larvae that settled and metamorphosed into benthic hydroid colonies consisting of feeding hydranths and medusa producing gonangia. Newly released medusae were grown to maturity and placed on educational display at the Monte

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Islam, Md Rafiqul, Snigdha Khatun, Azmul Huda, M. Mazibur Rahman, and Mahbubul Alam Asad. "Nitrogen use efficiency and yield of BRRI dhan49 as influenced by different forms of N fertilizers under AWD condition." Research in Agriculture Livestock and Fisheries 6, no. 1 (May 13, 2019): 27–33. http://dx.doi.org/10.3329/ralf.v6i1.41383.

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An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during Aman season of 2016 to evaluate the effects of deep placement of N fertilizers in the form of urea super granule (USG) and NPK briquettes in comparison with prilled urea (PU) on nitrogen use efficiency and yield of BRRI dhan49. The soil was silt loam in texture having pH 6.27, organic matter content 1.95% and total N 0.136%. The experiment was laid out in a Randomized Complete Block Design (RCBD) with eight treatments and three replications. The treatments include T1 (Contr

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Davis, Amanda J., and Bernadine C. Strik. "Long-term Organic Production Systems in Northern Highbush Blueberry: Placing Weed Mat over Existing Organic Mulches and Changing to Nitrogen-only Fertilizer Sources Increased Yield." HortScience 56, no. 8 (August 2021): 897–908. http://dx.doi.org/10.21273/hortsci15908-21.

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In long-lived organic blueberry production systems, nutrient imbalances caused by some fertilization and mulching practices can reduce plant growth and yield. The ability to balance nutrient levels and thus improve productivity over time was evaluated in a mature planting of ‘Duke’ and ‘Liberty’ that had been used to study different mulching practices [sawdust (9-cm deep), yard-debris compost (4-cm) topped with sawdust (5-cm), and weed mat] and various rates and sources of N fertilizer (feather meal or fish solubles, each applied initially at “low” or “high” rates of 29 and 57 kg·ha−1 N in 200

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Roberts, Bruce R., Henry F. Decker, Kenneth J. Bagstad, and Kathleen A. Peterson. "Biosolid Residues as Soilless Media for Growing Wildflower Sod." HortTechnology 11, no. 2 (January 2001): 194–99. http://dx.doi.org/10.21273/horttech.11.2.194.

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Two biosolid-containing waste media [sewage sludge compost and incinerated biosolids (flume sand)] were tested individually, together, and in combination with a commercial growing medium for growing wildflower sod in greenhouse trials over a 3-year period. A medium composed of flume sand and Metromix (7:3 weight/weight) in 7.5 {XtimesX} 10.5 {XtimesX} 2-inch deep (19 {XtimesX} 27 {XtimesX} 5-cm) plastic trays seeded at 20 oz/1000ft2 (6.1 g·m-2) with cosmos (Cosmos bipinnatus), cornflower (Centaurea cyannis), plains coreopsis (Coreopsis tinctoria), white yarrow (Achillea millefolium) and purple

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Hasan, Samia Lutfa, Md Rafiqul Islam, Mahmud Hossain Sumon, and Azmul Huda. "Deep placement of N fertilizers influences N use efficiency and yield of BRRI dhan29 under flooded condition." Asian Journal of Medical and Biological Research 2, no. 2 (August 9, 2016): 279–84. http://dx.doi.org/10.3329/ajmbr.v2i2.29072.

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An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during boro season of 2014 to evaluate the effect of deep placement of nitrogen (N) fertilizers on N use efficiency and yield of BRRI dhan29 under flooded condition. The soil was silt loam in texture having pH 6.27, organic matter content 1.95%, total N 0.136%, available P 3.16 ppm, exchangeable K 0.095 me%, available S 10.5 ppm and EC 348 ?S cm-1. The experiment was laid out in a Randomized Complete Block Design (RCBD) with eight treatments and three replications. The treatments

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Islam, Md Rafiqul, Mahthir Been Mohammad, Mst Tazmin Akhter, Md Moyeed Hasan Talukder, and Kawsar Hossen. "Effect of deep placement of N fertilizers on nitrogen use efficiency and yield of BRRI dhan29 under flooded condition." Asian Journal of Medical and Biological Research 3, no. 4 (January 30, 2018): 454–61. http://dx.doi.org/10.3329/ajmbr.v3i4.35336.

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An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during boro season of 2016 to evaluate the effect of deep placement of nitrogen (N) fertilizers on N use efficiency and yield of BRRI dhan29 under continuous flooded condition. The soil was silt loam in texture having pH 6.27, organic matter content 1.95%, total N 0.136%, available P 3.16 ppm, exchangeable K 0.095 me%, available S 10.5 ppm and EC 348 μS cm-1. The experiment was laid out in a Randomized Complete Block Design (RCBD) with eight treatments and three replications. The

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Davenport, Joan R., and Carolyn DeMoranville. "Temperature Influences Nitrogen Release Rates in Cranberry Soils." HortScience 39, no. 1 (February 2004): 80–83. http://dx.doi.org/10.21273/hortsci.39.1.80.

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Native nitrogen is released when soils are mineralized. The amount of N released by this process depends on the amount of organic matter present and soil temperature. Cranberry (Vaccinium macrocarpon Ait.) grows in acidic soils with a wide range in organic matter content. To evaluate release of cranberry soil N at varied soil temperatures, intact soils were collected from sites that had received no fertilizer. Soils were cored and placed in polyvinyl chloride (PVC) columns 20 cm deep × 5 cm in diameter. Four different soil types, representing the array of conditions in cranberry soil (mineral,

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Bijay-Singh and J. C. Katyal. "Relative efficacy of some new urea-based nitrogen fertilizers for growing wetland rice on a permeable alluvial soil." Journal of Agricultural Science 109, no. 1 (August 1987): 27–31. http://dx.doi.org/10.1017/s0021859600080941.

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SummaryEfficiency of N contained in some modified urea fertilizers was studied for wetland rice grown in an alkaline, low organic matter Fatehpur loamy sand (Typic Ustipsamment) soil having an average percolation rate of 109 mm/day. In the four field experiments, sulphurcoated urea (SCU) produced significantly more rice grain than urea supergranules (USG) or divided applications of urea or ammonium sulphate. Application of SCU at 58 kg N/ha yielded as much rice grain as was produced by divided application of urea at 116 kg N/ha. The N uptake data suggested that SCU-N was more efficiently trans

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Núñez-Moreno, Humberto, James L. Walworth, Andrew P. Pond, and Michael W. Kilby. "Soil Zinc Fertilization of ‘Wichita’ Pecan Trees Growing Under Alkaline Soil Conditions." HortScience 44, no. 6 (October 2009): 1736–40. http://dx.doi.org/10.21273/hortsci.44.6.1736.

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The effect of soil banding zinc sulfate and zinc (Zn)-EDTA was evaluated over a period of 4 years on established ‘Wichita’ pecans [Carya illinoinensis (Wangenh.) K. Koch] growing in alkaline, calcareous soil. Treatments evaluated were ZnSO4 applied at 74 kg Zn/ha and Zn-EDTA at 19 kg Zn/ha. These materials were applied just once on 23 Mar. 2005. Fertilizers were injected in two bands placed 1.2 m from either side of the trunk of the tree and 18 cm deep. Treatments were replicated four times in a randomized complete block design. Data collected included foliar Zn concentrations throughout the s

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Machaty, Z., C. Wang, and K. Lee. "176 CYTOCHALASIN PREVENTS SPERM HEAD INCORPORATION INTO FERTILIZED PIG OOCYTES." Reproduction, Fertility and Development 24, no. 1 (2012): 200. http://dx.doi.org/10.1071/rdv24n1ab176.

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At fertilization, an acrosome-reacted sperm fuses to the plasma membrane of the oocyte. It is then internalized into the ooplasm and its head forms the male pronucleus that moves toward the female pronucleus. Experiments using cytochalasin, an inhibitor of actin polymerization, suggest that filamentous actin is necessary for spermatozoa incorporation deep into the oocyte cytoplasm. However, the exact role of actin in the process is not entirely clear and the consequences of inhibiting actin polymerization on embryo development are not known. In the present study, we investigated the effect of

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Wyatt, Jim E., Don D. Howard, Don D. Tyler, and Craig H. Canaday. "135 Tillage Systems and Fertilization Methods for Staked Tomatoes." HortScience 34, no. 3 (June 1999): 465A—465. http://dx.doi.org/10.21273/hortsci.34.3.465a.

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Reduced and no-tillage vegetable production is gaining in acceptance in the Southeastern United States. Conventional till, strip-till, and no-tillage systems with different methods of nitrogen application in staked tomatoes were studied in Tennessee. Conventional tillage plots were prepared by disking and harrowing, strip till plots were cultivated ≈16 cm deep with a rear-tine tiller (≈50 cm wide), and no-till plots were established in chemically killed wheat with no cultivation. Four nitrogen treatments were applied at 67.2 kg·ha-1 N using liquid KNO3. The treatments included applying the N e

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Poliakovskyi, V. M., V. M. Mykhalska, L. V. Shevchenko, and М. S. Gruntkovskyi. "Biological features of guests and requirements for their containment." Sučasne ptahìvnictvo, no. 11-12 (December 23, 2020): 22–27. http://dx.doi.org/10.31548/poultry2020.11-12.022.

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This article reveals the biological features of guinea fowl and methods of keeping them. Guinea fowl are raised and bred to produce dietary meat, high-quality eggs, and to control pests of crops: snails, insects, including the Colorado potato beetle. The main direction of growing guinea fowl is meat, in terms of meat yield guinea fowl are not inferior to chickens. The taste of guinea fowl resembles game, but it is more tender, juicy and not fibrous. Guinea fowl have a horizontally placed oval body, short neck, large head with a strong growth in the crest, short, lowered tail. Guinea fowl are u

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Way, M. O., and R. G. Wallace. "Control of Rice Water Weevil with Exp 80698A 75 Fs in a Water-Seeded, Pinpoint Flood Culture, 1997." Arthropod Management Tests 23, no. 1 (January 1, 1998): 269–70. http://dx.doi.org/10.1093/amt/23.1.269a.

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Abstract The experiment was conducted at the TAMU Agricultural Research and Extension Center at Beaumont and was designed as a RCB with 6 treatments and 4 replications. Each plot was 15 ft X 8 ft and surrounded by a metal barrier to prevent movement of insecticide. On 19 Apr, plots were fertilized with urea at 113 lb nitrogen/acre and treated with Ordram 15 G at 17 lb/acre. Selected plots were sprayed with selected insecticide treatments on 19 Apr using a 4 nozzle (tip size 800067, 50 mesh screens); hand-held spray rig pressurized with CO2. Final spray volume was 16 gpa. The insecticides were

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Saeki, K., D. Iwamoto, S. Taniguchi, M. Kishi, and N. Kato. "166 MATURATION OF BOVINE OOCYTES IN POLY(DIMETHYLSILOXANE) MICROWELLS AND THEIR SUBSEQUENT DEVELOPMENT FOLLOWING IN VITRO FERTILIZATION." Reproduction, Fertility and Development 26, no. 1 (2014): 197. http://dx.doi.org/10.1071/rdv26n1ab166.

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During bovine oocyte maturation, a lower density of cumulus cells surrounding oocytes reduces the developmental competence of the oocytes after IVF. Adding more cumulus cells (Hashimoto et al. 1998) rescues the developmental competence of the corona-enclosed oocytes. In this study, we examined the effects of poly(dimethylsiloxane) (PDMS) microwells (MW) for bovine oocyte maturation on the developmental competence of the oocytes following IVF. In experiment 1, MW were produced by making holes on 0.5-mm-thick PDMS plates using a 0.5-mm-diameter biopsy punch. The punched plates were placed on the

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Way, M. O., and R. G. Wallace. "Control of a Sharpshooter with Exp 80698A and Karate, 1997." Arthropod Management Tests 23, no. 1 (January 1, 1998): 273. http://dx.doi.org/10.1093/amt/23.1.273.

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Abstract The experiment was conducted in a greenhouse at the TAMU Agricultural Research and Extension Center at Beaumont and was designed as a RCB with 6 treatments and 4 replications. The greenhouse was maintained at 31° C, 70% relative humidity, and 12 h light:12 h dark. Each experimental unit was a pot (6 inch diam X 6 inch deep) filled with sifted League soil. On 30 Sep, selected pots were planted with 8 untreated or EXP 80698A 75 FS-treated seeds. Seeds were treated at the rates shown in the table using the “Le Sak” method developed by Rhone-Poulenc Ag Company. On the same day, selected p

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Nasir, M., K. Sumawidjaja, K. Sumawidjaja, and Irzal Effendi. "Control of Natural Food with Diazinon for Growth and Survival of Marbled Goby, Oxyeleotris marmorata (Bleeker)." Jurnal Akuakultur Indonesia 3, no. 2 (August 1, 2007): 19. http://dx.doi.org/10.19027/jai.3.19-24.

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<p>Dua percobaan telah dilakukan, yaitu tanpa dan dengan larva ikan. Percobaan pertama, yang menggunakan 3 konsentrasi diazinon 0. 2 dan 4 ppm dan 3 ulangan, mempelajari pertumbuhan rotifera, cladocera dan copepoda. Percobaan kedua mempunyai 2 perlakuan, yaitu diazinon 0 dan 4 ppm (yang terbaik dari percobaan pertama) serta 4 ulangan untuk mengevaluasi: 1) ketersediaan, pemanfaatan dan susunan jasad-jasad pakan, 2) pertumbuhan dan kelangsungan hidup larva, serta 3) perkembangan larva ikan. Larva yang berumur satu hari ditebar pada saat kelimpahan rotifera tertinggi di hapa dengan kepadat

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Kurosaka, S., N. A. Leu, and K. J. McLaughlin. "51 AGGREGATION REDUCES THE VARIATION OF GENE EXPRESSION LEVELS IN BOVINE CLONES." Reproduction, Fertility and Development 18, no. 2 (2006): 134. http://dx.doi.org/10.1071/rdv18n2ab51.

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Mammalian somatic cell clones frequently exhibit abnormal gene expression that presumably results from errors in reprogramming of the transplanted genome. In the mouse, aggregation of 4-cell stage clones with each other improves reprogramming with respect to Oct-4 expression in blastocysts and an increase in term development (Boiani et al. 2003 EMBO J. 22, 5304-5312). To determine if clone-clone aggregation has a similar beneficial effect in the bovine, we aggregated 8-16 cell bovine clones with each other and profiled gene expression levels in bovine clones and clone-clone aggregates at the b

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Sharna, S. B. Z., S. Islam, A. Huda, M. Jahiruddin, and M. R. Islam. "Effects of Prilled Urea, Urea Briquettes and NPK Briquettes on the Growth, Yield and Nitrogen use Efficiency of BRRI Dhan48." Asian Journal of Soil Science and Plant Nutrition, June 3, 2021, 19–27. http://dx.doi.org/10.9734/ajsspn/2021/v7i330114.

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Nitrogen is one of the most deficient plant nutrients in Bangladesh soils. The use nitrogenous fertilizer especially urea is a commonly used fertilizer for rice production but its efficiency very low about 30-40% under traditional broadcast method A field experiment was carried out in the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during Aus rice growing season of 2014 to investigate the effects of prilled urea, urea briquettes and NPK briquettes on the growth, yield, and nitrogen use efficiency of BRRI dhan48. There were six treatments as T1 [check (N0P16K

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Aronsson, Helena, Lotten Wahlund, Malin Lovang, Ebba Hellstrand, Åsa Odelros, and Eva Salomon. "Phosphorus load in outdoor areas for laying hens and capacity of phosphorus retaining materials to reduce the environmental impact." Organic Agriculture, February 15, 2021. http://dx.doi.org/10.1007/s13165-021-00349-z.

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AbstractThis study investigated manure loads in outdoor paddocks for laying hens and the capacity of two phosphorus (P) retaining materials for reducing leaching from manure in areas with high hen density. Inventories on two commercial farms during 2 years (2017 and 2018) of the impact of hens (groups of 3000 hens) on vegetation, as a proxy for land use by hens, showed that 16–21% of outdoor area in grassland paddocks and 22–39% of area in a forest paddock were used by the hens. Sand and limestone were tested as P retention materials in areas with high manure load in a field study during the o

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