For the purpose of systematic study of the effect of winter wheat,field experiments were made in the central part of Shensi Province,China.The results obtained were summarized as follows:1.Summer plowing can improve the physical,chemical and biological properties of soil,and may be used as an important method for increasing the yield of winter wheat on the upland regions.
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李鸿恩,杨运莲.夏耕晒垡的增产作用[J].土壤学报,1965,13(4):404-410. LEE HUNG-EN, YANG YIN-LIAN. EFFECT OF SUMMER PLOWING ON THE WINTER WHEAT[J]. Acta Pedologica Sinica,1965,13(4):404-410.