Simulating Wheat Yield and Soil Moisture under Alternative No-tillage and Subsoil Tillage in Response to Fertilization Levels in Weibei Highlands Effects of different rotational tillage patterns on soil physical properties and yield of winter wheat-spring maize rotation field in Weibei highland Effects of rotational tillage on soil physiochemical propertiesand spring maize yield in Weibei Highlands Effects of tillage rotation and fertilization on soil aggregates and organic carbon content in corn field in Weibei Highland.