Effects of elevated atmospheric CO2 and nitrogen application on cotton biomass, nitrogen utilization and soil urease activity. Effects of different nitrogen fertilizers on N2O emissions in a highly acid tea orchard soils Distribution and fate of nitrogen fertilizer in various soil nitrogen pool at wheat seedling stage Effects of a controlled-release nitrogen fertilizer on tea yield and quality and rational application technology Effects of Nitrogen Rate and Ratio of Base Fertilizer and Topdressing on Uptake, Translocation of Nitrogen and Yield in Wheat Studies on the 15 N Absorption and Utilization Characteristics of Strawberry inDifferent N Application Stage Effects of Different Nitrogen Fertilizer Rates on Nitrogen Absorption by Ryegrass(Lolium muliiflorum) under Salt Stress Nicotine synthesis and nicotine-N source in flue-cured tobacco influenced by transplanting date and N fertilizer Absorption and Partition of Different Nitrogen Forms in Strawberry Studies on the 15 N Absorption and Utilization Characteristics of Strawberry inDifferent N Application Stage Effects of nitrogen addition on microbial respiration and root respiration in a sandy grassland. Effect of N application on nitrogen absorption and utilization of spring maize under different soil fertilities Effects of CO2 concentration enrichment, nitrogen and water on soil nutrient content and nutrient uptake of spring wheat Absorption and Partition of Different Nitrogen Forms in Strawberry