编辑同志:解放以来,我国许多土壤学著作、教科书、论文等多见有批判“土壤肥力递减律”的内容,有的还冠以“反动理论”字样,我一直想搞清“土壤肥力递减律”的具体内容,但很难找到答案。后来看到一本《土壤学基础与土壤地理学》,书中讲到威廉斯四个贡献,头一条就是批判“土壤肥力递减律”。于是再去读威廉斯的《耕作学原理》,那里也没有讲这一“规律”的来龙去脉和具体内容,只是批判赫尔里格尔的试验。仔细琢 Editorial Comrades: Since the liberation, many soil works, textbooks and dissertations in our country have witnessed the criticism of the law of diminishing laws of soil fertility and some have also labeled the words “reactionary theory.” I have always wanted to clarify the principle of “decreasing law of soil fertility ”The specific content, but it is difficult to find the answer. Later saw a book “soil science foundation and soil geography,” Williams talked about the four contributions to the book, the first is to criticize the “law of soil fertility decline.” Then he went to read Williams’s “Principles of Farming Theory” and there was no mention of the ins and outs of this “law” and the concrete content, only to criticize Hurliger’s experiment. Carefully cut