Effect of Tillage and Mulching on Enzyme Activities of Apple Orchard Soil Effect of Tillage and Mulching on Enzyme Activities of Apple Orchard Soil Carbon catabolic diversity characters of 9 chestnut soils in Beijing Physical degradation characteristics and mechanism of orchard soil in Weibei Region State of pesticide residue in litchi orchard soils in Guangxi and Fujian, China Effect of banana intercropping pattern and straw compost-return on soil enzyme activity Effect of different fertilization strategies on structure and activity of microbial community in tea orchard soils Effects of plant-derived organic materials and humification driving forces on soil microbial community diversity in orchards