The area of granite occupies 67.3% of total land area in Deqing county of Guangdong province. Due to artificial and natural factors

this county has the most serious disintegration in Guangdong province. Based on the contributing factors

types and features of the disintegration

the guiding principles of disintegration control are to apply the coordination of engineering and biological measures

which is to use engineering techniques to arrest the immediate loss of soil

and to develop re-vegetation programs for long-term stabilization of the slopes. Great benefits of society

ecology and economy have been attained after it has been controlled since 1949

but the soil erosion (especially disintegration) is still very serious. Therefore

it must be controlled permanently. At the same time

some feasible proposals are presented for its controlling.