Controls over soil organic carbon content in grasslands Influences of soil environmental factors on Oncomelania Snail distribution in the hilly and mountainous areas Responses of Belowground Biomass and Biomass Allocation to Environmental Factors in Central Grassland of Inner Mongolia Arbuscular mycorrhizal fungi diversity and its relationship with soil environmental factors in different soil types A Study on the Coupling Relationship of Soil and Vegetation of Leymus Chinensis Grassland in the Songnen Plain Characteristics of Carex brevicuspis and its impact factors in Dingzidi, East Dongting Lake. Soil microbial variation and relationship with soil environmental factors in the desert hinterland greenbelt