In the field and artificial simulation condition the experiment was conducted in order to raise the usage rate and translation efficiency of precipitation in droughtland. Results indicated that under the conditionwhen there is lack of water in the soil

deep ploughing will lead to decrease yeild before sowing

deep ploughing will aggravate the dispellingof the soil water when the field is fallow in the summer. Overburdenlayer 510 cm in the field can reduce eva pbration

at the same time

canraise soil temperature and increase the nutriment content in soil. It canincrease fertilizer of winter wheat and make the roots widedeveloped

toreduce freeze injury and increase grain yeild. To heighten fertility ofsoil

to use more manure and fertilizer can raise the translation efficiency of precipitation

change the potential of limited moisture to theproductivity of soil.