Soil microbial biomass N also involved in nitrogen supply to crop.
土壤中微生物氮也参与了对作物的供氮过程。
The relationship between mineralizable soil N and crop N uptake was studied under the condition of pot and field experoments respectively.
在盆栽和田间条件下，研究了作物吸氮与土壤可矿化氮的关系。
The quantity of crop nutrients transferred from the system, and the nutrient budget of N, P and K in soil were studied.
研究了在养分循环再利用的基础上采取不同施肥制度下作物养分移出量，并结合施肥量计算出土壤中N、P、K养分收支。
Pigeon pea: cover crop suited to human and animal nutrition, pest and disease control, N fixation and P disponibility.
豌豆是人类和动物的营养物，作为覆盖作物有效控制病虫害，固定氮素。
Commodity brokers in the Corn Exchange reacted swiftly to news about crop failure in N. America.
谷物交易所得商品经纪人对北美作物歉收的消息做出迅速反应。
Understanding the changes in grain quality and its response to nitrogen (N) fertilizer during the improvement of crop varieties has great significance in both crop breeding and cultivation.
旨在探明中籼水稻品种改良过程中米质变化特点以及施氮量对其产量和品质的影响。
The influence of root growing space of maize upon root physiological characteristics, nutrient uptake and crop yields were studied under conditions with and without supply of water and n.
在不供应和补充供应水、氮条件下，研究了限制根系生长空间对玉米根系生理特性、植株养分吸收及产量的影响。
The results showed that light fraction C and N pools of the alfalfa-crop rotation systems were higher than in alfalfa grassland.
结果表明，土壤轻组有机碳和氮含量苜蓿-作物轮作系统高于苜蓿草地。
The regression mathematical models for the yields of summermilletassociated with crop density, N and P fertilizers were established by using the optimal saturation D design.
研究采用二次饱和D-最优设计，建立了夏谷产量与密度、磷、氮肥的回归数学模型。
Soil acidification, as influenced by N-fertilizer, stubble management and crop rotations, was investigated using soil samples from a long-term rotation trial at Tarlee, South Australia.
用南澳大利亚Tarlee地区一个长期田间试验的土壤样品研究了轮作措施、氮肥施用和残茬管理对土壤酸化的影响。
Soil acidification, as influenced by N-fertilizer, stubble management and crop rotations, was investigated using soil samples from a long-term rotation trial at Tarlee, South Australia.
用南澳大利亚Tarlee地区一个长期田间试验的土壤样品研究了轮作措施、氮肥施用和残茬管理对土壤酸化的影响。
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