nitrogen fertilizer Articles
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On-farm assessment of the amount and timing of nitrogen fertilizer on ammonia volatilization
Ammonia (NH3) volatilization is one of the main pathways through which applied N enters the environment undesirably. A seven site-year on-farm field experiment was performed for 3 yr at Ottawa, ON, and 2 yr at Guelph, ON, and Saint-Valentin, QC, Canada. Our objectives were to (i) quantify the flux and the amount of NH3 volatilization as affected by the rate and time of N fertilizer; (ii) assess ...
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Nitrogen storage with cover crops and nitrogen fertilization in tilled and nontilled soils
Improved crop and N management practices are needed to increase soil N storage so that N fertilization rate and the potential for N leaching can be reduced in tilled and nontilled soils. We examined the influence of cover crops and N fertilization rates on N inputs from cover crops, cotton (Gossypium hirsutum L.) and sorghum [Sorghum bicolor (L.) Moench] and soil total N (STN) content at the 0- ...
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Nitrate leaching in two irrigated soils with different rates of cattle manure
Received for publication December 15, 2008. Manure applied to irrigated land may potentially contaminate groundwater with NO3–N. An 8-yr field experiment was conducted in southern Alberta, Canada, to determine the effects of different rates of manure on NO3–N accumulation in two irrigated soil types and NO3–N leaching to shallow groundwater. An annual cereal silage was grown at each site and ...
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Evaluation of dandelion as a potential forage species in mixed-species swards
Recent research has indicated that increasing species diversity of the pastures might improve sward productivity and stability. The present experiment evaluates the effect of dandelion (Taraxacum officinale Weber) as a potential pasture species on the performance of a perennial ryegrass (Lolium perenne L.)–white clover (Trifolium repens L.) mixture in terms of total herbage yield, weed ...
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Irrigated, no-till corn and barley response to nitrogen in Northern Colorado
Converting irrigated, conventional-till (CT) systems to no-till (NT) production systems can potentially reduce soil erosion, fossil fuel consumption, and greenhouse gas emissions. Nitrogen fertilization effects on irrigated corn (Zea mays L.) and malting barley (Hordeum distichon L.) yields in a corn-barley rotation were evaluated for 6 yr on a clay loam soil to determine the viability of using a ...
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Nitrogen, tillage, and crop rotation effects on carbon dioxide and methane fluxes from irrigated cropping systems
Received for publication December 15, 2008. Long-term effects of tillage intensity, N fertilization, and crop rotation on carbon dioxide (CO2) and methane (CH4) flux from semiarid irrigated soils are poorly understood. We evaluated effects of: (i) tillage intensity [no-till (NT) and conventional moldboard plow tillage (CT)] in a continuous corn rotation; (ii) N fertilization levels [0–246 kg N ...
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Interactive effects of tillage and mineral fertilization on soil carbon profiles
Both tillage and fertilizer management influence soil organic C (SOC) storage, but their interactive effects remain to be determined for various soil and climatic conditions. We evaluated the long-term effects of tillage (no-till, NT, and moldboard plowing, MP), and N and P fertilization on SOC stocks and concentrations in profiles of a clay loam soil (clayey, mixed, mesic Typic Humaquept). Corn ...
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Many Countries Reaching Diminishing Returns in Fertilizer Use
When German chemist Justus von Liebig demonstrated in 1847 that the major nutrients that plants removed from the soil could be applied in mineral form, he set the stage for the development of the fertilizer industry and a huge jump in world food production a century later. Growth in food production during the nineteenth century came primarily from expanding cultivated area. It was not until the ...
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Fertiliser taxation and regulation of nonpoint water pollution: a critical analysis based on European experiences
In Europe, the effectiveness of current forms of control of nonpoint nitrogen pollution is considered to be weak. This assessment highlights the need to introduce more efficient modes of regulation. Many economists recommend a simple tax based on known polluting factors, for example a tax on purchases of mineral fertilisers. In addition to its simplicity of application and low information cost, ...
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It’ll all be for the same purpose: to maximize the yield and take care of that soil
Brad McDougald jokes that farmers can always find something to complain about. “Doesn’t matter whether it’s too warm, too dry, too cold,” McDougald says with a chuckle. This year was a dry season in Drumheller, Alta., where his 2,500-acre farm produced about 40 per cent of its regular yield of wheat, canola, peas, lentils and barley. But for all the elements outside a ...
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High efficiency and high quality controlled release fertilizer has a broad market space
1. High quality controlled release fertilizer is a special fertilizer for vegetables and fruits. Vegetables, fruits and other products are high-value agricultural products, in the international market price competitiveness is strong, so vegetables, fruit crops in the special fertilizer demand is larger. 2. Industrial organic fertilizer. Long term partial application of chemical fertilizer can ...
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NPK Compound Fertilizer Development and Fertilizer Plant Production
Chemical fertilizer provides nutrients for continuous agricultural production, but single chemical fertilizer hasn't high utilization rate, limited promotion ability to crops, and a large amount of application is not conducive to crop growth. NPK compound fertilizer production has become the main trend of fertilizer. The granulation process of NPK fertilizer production line can make basic ...
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Operation precautions of NPK fertilizer granulation coating
In the NPK fertilizer manufac?turing process, a coating process is added to make a slow-release fertilizer. Slow-release fertilizer is also called controlled-release fertilizer. The release rate of nutrients in fertilizers can be controlled to a certain extent for continuous absorption and utilization by crops. After the fertilizer is coated, it can reduce the loss of fertilizer nutrients, ...
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Main Granulating Methods of NPK Compound Fertilizer Production
NPK fertilizer can supply many kinds of nutrients needed by crops at the same time. The economic benefit is obvious. The production cost can be reduced by using compound fertilizer. Compound fertilizer is not easy to agglomerate, easy to store and use, and is widely welcomed. How to select granulator for NPK fertilizer production line? Several main granulation methods are introduced here. 1. ...
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