The soil loss and deterioration of ecological environment over theworld have been recognized identically

the concerned are formulated andeffective measures accepted

the governments have paid much attentionto soil loss and deterioration of environment

taking protection of ecological environment as a national policy after the Second Conference on Environment Protection and promulgating a set of policies and measures.Meanwhile

it makes people anxious to damage when to be harnessed

todamage from many sides and harness by one side

even not to harnessseriously.The deterioration is still on

with unfavourable changing of environment on the earth it is thought as a severe problem and could not betreated lightly.Now the urgent task

facing the natural science

technicalscience

manage science

especially the sciences of environment

economy

ecology and soil conservation

is taking action urgently to raise plan

to work out effetive measures and to coodinate the relationship betweenmankind and nature to prevent deteriorating of the ecological environment.