Vegetation recovery techniques and benefit evaluation on sloping returned grain plots in the northern area of Shaanxi;

Based on the principle of gradualy control, different level classification, all covering and main factors, the steep cultivated land for quitting was classified to 6 site type areas by macrolandforms, 5 site type subareas by rock group characteristic, 2 type groups by gradient, and 3 types by soil layer thickness in noncarbonatite areas, 4 site types by soil continuity in karst areas.

Sustainable development of the society and economy has inevitably been restricted in the region,so that the de farming and afforestation in the steep cropland become far more significant for the development of the society and economy there.

On the bases of dry sloping fields structure and its damages, the countermeasures of conversion from farmland to forest in steep slop land are pointed out on sustainable development, that is to program the plan of conversion of farmland to forest and using; to use the steep slop land reasonably of conversion f.

Soil moisture character of agro-forestry and contour ridge tillage technique of slope cropland in Three Gorges Reservoir Area;

A field experiment was conducted in hilly area of central Sichuan Basin to study the characteristics of leaching and soil P loss in the leachate from slope cropland of purple soil under natural rainfall during maize growth period.

The results showed that the erosion in the front and middle parts of the slope cropland were the most fierce belt,which was less in the top of slope and soil deposit in the bottom.