The border effect and utilization rate of N fertilizer as base under wheat intercropped with spinach;

Four treatments were designed as the control (without urea incorporation); low N fertilizer level(0.

In this paper,the concept related to ~(15)N application were introduced and interpreted,and the studies on N fertilizer research,N cycling and agricultural environment protection since 1980 were reviewed in detail.

Global scope assessment of China's nitrogenous fertilizer industry;

Interactive effects of super absorbent polymer and nitrogenous fertilizer;

Competitive Strategic Analysis on China Nitrogenous Fertilizer Industry;

Effect of N-fertilizer Levels on Physiobiochemistry in the Middle and Late Growth Stage of Super Hybrid Rice Ⅱ Youhang 1;

Effect of Application Level of N-fertilizer on Nutritional Values of Corn Stalks;

Effect of N-fertilizer Application Patterns on Yield and N-fertilizer Efficiency of Corn;

Study on the Effects of Nitrogen Application and Planting Density on the Yield of Jingdan 28;

Effects of interaction of photoperiod and nitrogen on activities of enzymes of carbon and nitrogen metabolism of Huanong No.1 ensilage corn;

The Effect of Nitrogen on Nitrate Leaching and Absorption under Spring Corn in Dry Arears of North China;

Influence of herbicides on denitrification loss of nitrogen fertilizer and emission of N_2O.;

Study on the residual effect of nitrogen fertilizer in spring wheat cultivation in semiarid areas;

Effects of combined application of organic and inorganic nitrogen fertilizer on the soil nitrogn leaching and the growth of leaf-used lettuce;