| After agricultural wastes are decomposed by microorganism, they become harmless to environment, and can be processed into organic-inorganic fertilizers. In order to study the effect of organic-inorganic fertilizers to crops in dry land, the field experiment was carried out with summer maize and winter wheat from 2000 to 2002 in Weibei highland in Shaanxi province. The results showed that the organic-inorganic fertilizers could ameliorate the yield composition of summer maize and winter wheat. Therefore, the yield of maiand wheat was increased by 874.5～1144.5 kg／hm2 and 756.0～901.5 kg／hm2 respectively, and the water use efficiency of maize and wheat was increased by 2.784～3.399 kg／(mm·hm2) and 1.311～1.695 kg／(mm·hm2) respectively. It was concluded that the yield and water use efficiency of crops could be improved in dry land by applying the organic-inorganic fertilizers. |