Effect of row spacing on nitrogen uptake, nitrogen utilization and yield of summer maize Effects of Different Amount of Straw Incorporation on Grain Yield, Nitrogen Uptake and Use Efficiency in Wheat-rice Rotation System Characterization of Nitrogen Uptake and Utilization in Rice under Different Planting Methods Differences and Correlations in Grain Yield, N Uptake and Utilization Between Medium-Maturing Indica and Japonica Rice under Different N Fertilizer Levels Effects of reduced nitrogen application on nitrogen uptake and utilization efficiency in maize-soybean relay strip intercropping system Effects of nitrogen application rate on the nitrogen uptake and utilization of cotton grown in coastal saline fields of Yangtze River Valley Effects of nitrogen application rates on nitrogen uptake and utilization of direct-seeded cotton after wheat harvest. DIFFERENCE OF NITROGEN UPTAKE AND UTILIZATION IN WHEAT CULTIVARS  WITH DIFFERENT GRAIN YIELD LEVEL General Characteristics of Nitrogen Uptake and Utilization in Conventional Indica Rice Cultivars with Different Panicle Weight Types Effects of nitrogen application rate on soil inorganic nitrogen distribution,microbial biomass nitrogen content and yield of wheat