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下面登载北京师范学院农基系及北京市农科院有关土壤(和植物)中主要养份测定方法的两篇文章。供同志们根据当地情况,因地适宜地参考使用。
Below is a list of two articles by Beijing Normal University Agronomy Department and Beijing Academy of Agricultural Sciences on methods for determining major nutrients in soils (and plants). For comrades based on local conditions, due to local reference for use.