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渭北早塬主要是雨养农业。为了进一步利用降水的生产潜力,我们进行了以下的研究工作。材料与方法旱塬农田降水生产潜势的测定,是用人工培肥的方法组成不同的肥力梯度,以综合丰产栽培措施测定作物产量与土壤肥力关系。以创
Weibei early plateau is mainly rain-fed agriculture. In order to make further use of precipitation potential, we conducted the following research work. MATERIALS AND METHODS The determination of the precipitation potential of farmland in dryland was made by artificial fertilization, and the relationship between crop yield and soil fertility was determined by comprehensive high yielding cultivation measures. To create