The first to introduce the term "earth-sphere", this paper mainly expounds the formation of land in the earth-sphere, the type of land, and unfavourable factors in good conditions and development of land resources, illustrated with reality of China.

Effect of soil type and organic material on NH_4~+-N recovery rate;

Effects of climate and soil type on growth and wood quality of slash pine plantations;

Effects of soil type and land use pattern on microbial biomass carbon;

A study on land types and proper land uses in karst area——an illustration by Banchuang village,Changshun;

Bases on the past studies of crop productive potential in the area of the Loess Plateau, mathematical models of grain productive potential for the different land type of the soil and water erosion area were established and some parameters in the models were recalculated and determined too.

Through the analysis of contour lines and land-use map and establishing digital elevation model and land type database, this paper presents an evaluating method of evaluating the backscattering coefficient on radio waves unitary under the conditions of a complicated large scale area.