The loess Yuan region is located in the south of loess plateau. The half-moist climatic condition of warm temperature zone and the deep loess provide more supeior natural condition for plant growth. In the historical process the smooth yuan surface has been corroded-The area of gully is about 50-70 per cent of the total land area

and it is possessed of large productive potential. In order to develope the land resources in gully-slope

at first

we should fully utilize the gentle slope land which has been levelled and devote major efforts to develope fruit tree of park that take apple as the dominant factor. The second

we should increased proportion of economic forest and commercial forest and resolve.The problem of low output value and single tree species. The third

by use of clear-cutting

root-shooting regenerative technique

The protective forest of the Black locust (Robinia pseudoacacia)which yield is low will be transformed into the fast-growing

high-yielded forest. At last，we should suitably develope forage forest and put resources of forage growing wordsunder the forest to use rationally to resolve the contradictory between forestry and animal husbanedry.