A Study of Comparability of Nature Quantity Cent in Different Criterion Districts of Farmland Classification ——with Henan Province as an example

The classification of farmland is an investigation project with a comparability nationwide(in province first),in which land background quantity is calculated with criterion districts as cells.This paper discusses the problem of comparability of the nature quantity cent in different criterion districts by combining the practice of classification of farmland in Henan Province and analyzes the influence on the comparability of classification result caused by the comparability of nature quantity cent,and points out the problems through analyzing the calculation method of nature quantity cent in the regulations of classification of farmland.Finally,the paper introduces a method of studying the comparability of nature quantity cent by using the standard spot system.