我国农用地分等定级研究综述

农用地分等定级是个较复杂的问题。近年国内虽然在农用地分等定级研究的理论及方法上进行了深人研究，但认识还不统一，在研究过程中往往将分等和定级两个不同概念模糊化。文章对农用地分等定级的概念内涵和分等定级研究的形势要求进行了详细分析，并回顾了国内农用地分等定级的理论和方法研究，总结了我国农用地分等定级的主要方法体系，并对其中模拟作物产量法、限制因素法、综合指数法进行了详细论述。文章最后对农用地分等定级存在的问题提出了一些建议，力图使分等定级方法体系更为完整，为农用地分等定级的实际工作提供切实可行的理论依据。

REVIEW ON STUDY FOR AGRO-LAND CLASSIFICATION AND GRADATION IN CHINA

Agro-land classification and gradation is comparatively complicated. Researchers lucubrate the theory and approach on agro-land classification and gradation in China, but they aren't unanimous to the method and result of agro-land classification and gradation, and can't define the concepts definitely or equate classification and gradation sometimes. Though the concept and technical route of agro-land gradation are prescribed in the regulations on agro-land gradation and classification,there are many problem in logic. This paper analyzes the concept and connotation detailedly, reviews Chinese research on land evaluation, and discusses the purpose of agro-land classification and gradation. Agro-land managing, planning, taxation reforming is the main evaluation purpose at present. The authors sum up three most representative methods on agro-land classification and gradation in China. They are: (1) The method of limiting factors; (2) The methods of simulated crop production; (3) The method of synthetic exponent. This paper puts forward some suggestion on the problem of agro-land classification and gradation, intends to provide criterion for agro-land classification and gradation, and discusses indexes choosing and approach of coefficient calculating and the application of new method and technical route. It is extremely essential that the result of agro-land classification and gradation integrate others result of land evaluation.