论文部分内容阅读
第l期淮北农区几种农牧结合方式的研究···················································‘·····……程为国黄晓澜(1)皖稻27号产量构成因素分析及其增产措施·························
The first l of Huaibei agricultural several kinds of farming and animal husbandry combined with the method of ... ··············································································································································································································································································································································································································· ·······························