Effects of land use on distribution and protection of organic carbon in soil aggregates in karst rocky desertification area Effects of fertilization and mulching with plastic film on profile distribution and dynamics of Olsen-P in brown earth Characteristics and Correlation Analysis of Soil Nutrient and Enzyme Activities of the Middle Yellow River Wetland Analysis of soil nutrient characteristics under different land use patterns in the northern piedmont of Yinshan Mountain Soil characteristics of medlar wood growing on secondary salinization land in Jingdian irrigation zone The effect of different land use patterns on soil properties in alpine areas of eastern Qilian Mountains Effects of typical soil types and land use patterns on soil enzyme activities in Guangdong Province Effects of Different Land Use Patterns on Soil Enzymes Activities and Chemical Properties on Riverbank Slopes of the Three Gorges Reservoir Nitrate accumulation and distribution in soil profiles in ecosystem of upland on the Loess Plateau Changes of soil microbial characteristics under long-term different land use patterns on an anthropogenic loess soil Dissolution rate under soil in karst areas and the influencing factors of different land use patterns Effects of sloping land use patterns on phosphorus loss in a micro-watershed of red soil area,Southern China