修正法是农用地定级的重要方法之一。
The modification method is an important means of agricultural land gradation.
以GIS为平台，采用修正法和因素法相结合，对乐山市中区农用地定级进行了研究。
Based on GIS technology, agricultural land gradation was studied applying factor method and modifying method in the centre of Leshan City, Sichuan Province.
目前我国基本上采用因素法进行农用地定级，而作为重要方法之一的修正法则应用很少。
Currently, the factor method is usually used to grade agriculture land, however, the modification method, as an important means, is rarely used.
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