Research progress on the effect and mechanism of fertilization measure on soil fertility Effect of submergence on rhizospheric soil enzyme activity and fertility of bermudagrass (Cynodon dactylon) Possibility of enzyme activities as indicators of assessing soil compound contamination with cadmium,zinc and lead Response of soil enzyme activity and microbial community structure, diversity to continuous cotton cropping in northern Xinjiang Response of Vicia faba growth and soil enzyme activity to low molecular polyethylene added in soil