Soil water movement is studied by building mathematical model and by the finite element analysis under two-dimensional rainfall infiltration and evaporation for the machine-building terrace in this thesis.

The optimal design of cross section of level terrace of farmland hole;

The paper primarily analyzes the change of soil moisture in different sections of level terrace and the change of chemical properties on terrace constructed in different years.

Level terrace in Chunhua was the system studied object, fallow sloping field was the check, and their soil moisture variety was dynamic monitored.

1 ) model to irnitate potentialyield and water - conservation yield of terraced lands, having determined the water-conservation yields and thire benefit-shared coefficients for terraced land and ridged slopeland in Inner Mongolia.

According to the experiment that alter the cultivating model based on the theory of ecoagriculture,the design of agroforestry which is the terraced field with slope in the loess steep slope land was introduced.