通过土壤养分系统研究法，诊断出贵州省铜仁地区松桃县黄泥土影响小麦产量的主要限制因子排列为：P>K>B。
The main soil nutrients of affecting wheat yield is P>K>B by the systematic approach for determining nutrient contents of the yellow soil in Tongren prefecture.
土壤水亏缺及杨树遮荫等其它原因造成复合系统农作物减产趋于严重，其中林龄3年的杨农复合系统的小麦玉米产量减产平均达到35%。
The production of crops in agroforestry decreased seriously because of lacking of soil water and illumination and so on, production of wheat and corn in 3 years agroforestry system decreased by 35%.
探讨了基于系统聚类分析对大田小麦进行区域化土壤养分管理的方法。
The method of regional soil nutrient management was studied based on systematic cluster analysis.
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