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Soil nitrogen content and enzyme activities in rhizosphere and non-rhizosphere of summer maize under different nitrogen application rates. Distribution characteristics of soil carbon and nitrogen in different land use types changed from urban wetlands. Influence of Nitrogen Fertilizer and Endophyte Infection on Ecophysiological Parameters and Mineral Element Content of Perennial Ryegrass EFFECT OF INORGANIC NITROGEN ON PHYTOPLANKTON SUCCESSION IN MARINE MESOCOSMS Rules of the Absorption,Distribution and Translocation of Nitrogen, Phosphorus and Potassium in Turmeric Plant Effects of fertilization method and nitrogen application rate on soil nitrogen vertical migration in a Populus ×euramericana cv. ‘Guariento’ plantation. Effects of nitrogen management on maize nitrogen utilization and residual nitrate nitrogen in soil under maize/soybean and maize/sweet potato relay strip intercropping systems. Concentrations of different carbon and nitrogen fractions in rhizosphere and non-rhizosphere soils of typical plant species in mountainous area of southern Ningxia, Northwest China. Coupling effects of  partitioning alternative drip irrigation with plastic mulch and nitrogen fertilization on cotton dry matter accumulation and nitrogen use. Effects of  chlorimuronethyl and urea on soil microbial biomass carbon and nitrogen and soil inorganic nitrogen. Decomposition of different plant litters in Loess Plateau of Northwest China.