Advances in plant nitrogen nutrient genotypic difference Effects of Soil Moisture and Nitrogen on Abscisic Acid and Cytokinin Contents in the Aboveground Plant Parts of Rice The nitrogen nutrient efficiency and the expression analysis of the related genes in different allelopathic potential rice(Oryza sativa L.) varieties at seedling stage Utilization of carbon and nitrogen nutrients by mycorrhizal fungi in oak forest Regulatory Effects of Nitrogen Nutrient and 6-BA on Winter Wheat Suffered Post-anthesis Waterlogging