Optimum-N application rate to maximize yield and protect the environment in a wheat-maize rotation system on the Guanzhong Plain, Shaanxi Province Long-term fertilization on yield increase of winter wheat-maize rotation system in Loess Plateau dryland of Gansu Crop yield and soil biochemical properties under different nitrogenfertilization and irrigation management schemes Effects of cultivation pattern and nitrogen rate on crop yield and water use efficiency in winter wheat-summer maize system Efficiency analysis of slow/controlled release fertilizer on wheat-maize in North China Effects of different cultivation patterns and nitrogen fertilization on soil nitrogen supply of in the wheat-maize rotation system Changes of soil microbial biomass carbon and nitrogen, and mineral nitrogen after a long-term different fertilization Greenhouse gas exchange and comprehensive global warming potential under different wheat-maize rotation patterns Ammonia volatilization and control mechanisms in the piedmont of North China Plain Soil nitrate leaching and control methods in the piedmont of North China Plain