Abstract:

The purpose of this paper is to divide cropland of the low yield in Henan province level in a comprehensive perspective, in order to build the grain core area to provide support. Methods employed are the method of comparative analysis, the GIS spatial analysis method, empirical analysis. The results indicate that(1)in low yield cropland level dividing results to be integrated into the grain yield, soil fertility, soil fertility and other factors;(2)according to the comprehensive factors of Henan province high school low yield cropland area ratio of 49 : 31: 20.It is concluded that (1)food production is still the main factor division of cropland of the low yield in, the factors on the high school division of cropland of the low yield the greatest impact, the difference between the results of minimum rate; It is the biggest to use of soil fertility factors classification result difference rate; It is best to use of farmland index factor classification results of equilibrium, it can use farmland index (particularly the use of index ) as a division of cropland of the low yield in a method.(2) Using single factor or focusing characteristics of farmland a divided the results are limited;(3) The factors for the standards of high school low yield cropland classification, the result collection effect is better than the factor.