A Study on Microorganism and Biochemical Activity of Chinese-fir Plantation on Different Ecological Area in Guangxi Microbial community and its activities in canopy- and understory humus of two montane forest types in Ailao Mountains, Northwest China. Study on Soil Microorganism Quantity and Biochemical Activity of First- and Second-Generation of Pinus massoniana Plantations in Qianzhong Studies on Soil Biochemical Activities of Degenerative Grasslands