Organo-mineral complexes were separated from different developing direction and phases of steppe soils with fractional method of particle-size and density, and their mounts, humus contents, composition and ratio of carbon to nitrogen were analyzed.

Five different land utilization methods of saline steppe soil in the west of Jilin province were selected,including grazing grassland,fencing grassland,tillable,new paddy field and long-term cultivate paddy field.

Effects of different land use types on carbohydrate content and aggregate stability in arid grassland soil;

Studies on the characteristics of soil fertility and relationshipamong nutritive factors in alpine grassland soil of Qilian mountains;