Effects of biological tillage on physicochemical properties and soil enzyme activity and growth and quality of Brassica oleracea var. italica Species diversity of vegetation in relation to biomass and environmental factors in the upper area of the Shule River Effect of sugarcane vinasse on soil physicochemical properties and oxidoreductase enzymes Effects of Different Plants on Soil Microbial Biomass and Enzyme Activities in Zhifanggou Watershed of Loess Plateau Effects of long-term fertilization on soil enzyme activities and soil physicochemical properties of facility vegetable field. Study of  tillage patterns suitable for soil physicochemical properties and crop yields in wheat/maize fields