Adaptation research of APSIM model under different tillage systems in the Loess hill-gullied region Yield and Lodging Resistance of Summer Maize under Different Winter Wheat-Summer Maize Tillage Systems Dynamic changes in nitrogen and phosphorus concentrations and emission- reduction potentials in paddy field water under different tillage models The starch pasting properties in different nitrogen topdressing treatments under spring and autumn season of waxy maize varieties Effect of CH4 uptake flux under different tillage systems in wheat field in the North China Plain Effects of different tillage systems on soil hydrothermal regimes in rain\|fed field of Inner Mongolia