Indices system and methods of monitoring gradation of agricultural land quality

For agricultural land, it is the foundation of achieving sustainable exploitation and utilization and keeping balance of requisition-compensation that obtaining the information of agriculture land gradation and its quality in real-time by the land gradation monitoring. Based on the existing agricultural land gradation monitoring indices system, variable indices which caused agriculture land gradation and quality changes were picked out according to analysis on the variability of indices. Authors analyzed driving forces which caused the changes of variable indices,and screened out the indices that could be used to monitor directly or indirectly and estimate agriculture land gradation and quality with consideration of the present monitoring technologies or driving force factors. Agricultural land gradation and quality monitoring index system were constructed and the relevant monitoring method was presented. The results indicated that constructed index system had strong regional characteristics for fully considering the difference of the driving forces in different sub-areas. Compared with traditional monitoring methods, the method in the research are more practical.