Under the natural rainfall conditions, the grain yield and water use efficiency of springwheat were able to be increased largely by using comprehensive cultivation methods which includechemical fertilizer organic manure, mulch in growth season and deep tillage. The results showthat during several years experimental period either drought or wet year by using chemicalfertilizer (N and P2O5 were 135~ 150kg/hm , separately) grain yield and water use efficiencywere able to be raised about 50%. By using organic m...
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