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- soil fertility nitrogen 地力氮
- It's an effective way to maintain soil fertility. 这是保持土壤肥力的一个有效办法。
- As a legume, crown vetch draws nitrogen from the air, trapping it in the roots, and thus improves soil fertility. 亦能固氮，从而增加土壤肥力。
- How do earthworms influence soil fertility? 蚯蚓如何影响土壤肥力?
- With the increasing of nitrogen rate, the curves of RVA profile decreased under the high, middle and low soil fertility levels. 两供试品种在高、中、低三种地力水平上，RVA谱曲线均随施氮量的增加而降低。
- The results showed that soil fertility levels and nitrogen rate had significant or extremely significant effect on RVA profile characteristics except one or two characteristics. 结果表明，地力水平、施氮量对RVA谱特征值的影响除个别指标外，均达到显著或极显著的差异。
- Ling Q,Hou L B,Han W.Effects of nitrogen rates on grain yield and quality of wheat in different soil fertility[J].Plant Nutr.Fert.Sci.,2004,10(6):561-567. [4]林琪;侯立白;韩伟.;不同肥力土壤下施氮量对小麦子粒产量和品质的影响[J]
- The soil fertility shows a decrease trend in cornpea rotation. 玉米、豆轮作，土壤养分均呈下降趋势。
- Influence of thinning on soil fertility in artificial forests. 抚育间伐对人工林土壤肥力的影响。
- The Impact of Soil Fertility on the Yield of Phyllanthus Emblica L. 土壤肥力对余甘子产量的影响。
- A green manure is a crop grown mainly to improve soil fertility. 种植绿肥作物主要是为使土壤更加肥沃。
- Han X R,Guo P C,Chen E F.Immobilization of fertilizer nitrogen by soil microbes and its changes[J].Acta Pedologica Sinica,1998,35(3):412-418. [19]韩晓日;郭鹏程;陈恩风.;土壤微生物对施入肥料氮的固持及其动态研究[J]
- Strip check space varies with plot slope, soil fertility and irrigation. 条畦宽度随地块坡度、土壤肥力和灌溉而变化。
- The paddy?upland system increased clay dispersion content and soil fertility. 水旱轮作可增加土壤黏粒含量,提高高沙土肥力水平;
- The status of soil aggregates is an important factor affecting soil fertility. 土壤团聚体和水稳性团聚体的状况是影响土壤肥力的一个重要因素。
- Amounts of nitrogen, phosphorus and potassium absorbed by hybrid rice varied with soil fertility, climatic condition, variety and fertilization managements. 杂交水稻吸收氮、磷、钾数量随着土壤肥力、气候条件、品种和施肥管理而变。
- Lin Q,Hou L B,Han W.Effects of nitrogen rates on grain yield and quality of wheat in different soil fertility[J].Plant Nutrition and Fertilizer Science,2004,10(6):561-567. [5]林琪;侯立白;韩伟.;不同肥力土壤下施氮量对小麦子粒产量和品质的影响[J]
- Application of Integrated Fertility Index Method in Evaluating Changes in Soil Fertility. 应用指数和法对潮土农田土壤肥力变化的评价研究。
- Urea is a nonionic fertilizer nitrogen material which has become of increasing importance in agricultural production. It is prepared by reacting anhydrous ammonia and carbon dioxide gas under very high pressure in the presence of a suitable catalyst. 尿素是一种非离子型氮肥，在农业生产上变得日益重要。它是在某种催化剂参与下，由无水氨和二氧化碳气体在高压条件下反应生成的。
- Artifical improvement of soil fertility in a regraded forest ecosystem by using municipal sewage sludge. 城市污泥对退化森林生态系统土壤的人工熟化研究。
