The western area of 1oss plateau of China

including the area of GansuProvince

Ninxia Hui Autonomous region and Haidon district of QinghaiProvince

lies in the arid and semi-arid climatic zone. The soil moisturegenerally is the state with low storage and low usability

all kinds of landremainds moisture potentiality in soil usable to the crops on the ground indifferent extent.The way to raise the use ratio of soil moisture is to adjustthe variety structure in the area of farming

forest and grass

to raise theground temperature in effective method

to raise the level of fertilizer ap-plication

using fertilizer to transform water

to develop larger mixed forestwith arbor tree and brush and to change the tillage style.