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QUANTITATIVE STUDY ON THE EFFECT OF NITROGENOUS FERTILIZER ON THE INFECTION CYCLE OF RICE LEAF BLAST Simultanenous determination of contents of four nitrogenous compounds in Pinellia peda-tisecta by HPLC Chemical constituents from Hydrangea macrophylla Effect of Biochar and Fertilizer on CO₂ and CH₄ Emission from Spring Maize Dryland Effect of Postponing N Application on Yield, Nitrogen Absorption and Utilization in Super-High-Yield Summer Maize EFFECT OF DISTRIBUTION MODES OF NITROGENOUS FERTILIZER ON WHEAT AND PEANUT YIELDS AND THE NITROGENOUS FERTILIZER UTILIZATION RATIO UNDER THE WHEAT PEANUT CROPPING SYSTEM Activities of Enzymes Related to Nitrogenous Metabolism and Grain Quality in Wheat with Different Irrigation Stage and Rate Effect of different nitrogen rates on yield and quality parameters of high grade yellow seed hybrid rape Morphology and structure of gel-based water-absorbent slow release nitrogen fertilizers and the influence of salt STUDIES ON CORRELATION BETWEEN VEGETABLE NITRATE ACCUMULATION AND FERTILIZER APPLICATION Effects of different ratios of straw to N-fertilizer on growth of Malus hupehensis seedling and its absorption, distribution and utilization of nitrogen Effect of different nitrogen forms on the growth of Microcystis aeruginosa and pH in the medium under darkness Studies on the fluxes of nitrous oxide from greenhouse vegetable soil Effect of Exogenous Salicylic Acid on Nitrogen Assimilation of Cucumber Seedling Under Drought Stress Efects of application of nitrogenous fertilizer on the short-dated cotton of top removal planting type Effects of nitrogen fertilizer rates and ratios of base and topdressingfertilizer on yield, quality  of tobacco leaves and N-use efficiency Effects of fertilization and plastic film mulched ridge-furrow cultivation on yield and water and nitrogen utilization of winter wheat on dryland Effects of different nitrogenous compounds on growth and nodulation of Abrus cantoniensis The grey water footprint of the winter wheat-summer maize crop rotation system of the North China Plain COMPARISON OF NET PHOTOSYNTHETIC RATE AND ~(14)C DISTRIBUTION BETWEEN DIFFERENT CULTURAL CONDITIONS ON DOUBLE CROPPING RICE STUDIES ON NITROGEN UPTAKE AND UTILIZATION BY RAPE (Brassica napus L.) UNDER DIFFERENT SOWING DATES Physiological response of Kobresia humilis to nitrogenous fertilizer in an alpine meadow Effects of nitrogenous fertilizer strategies on sugar components in the stubbles of Zea mexicana