Spatial Distribution Features for Natural Quality of Cultivated Land at County Levels Based on Multi-scale in Xiangyun County

To provide a reference for monitoring and protecting quality of cultivated land, we used the annual update results of agricultural land gradation as basic data,and analyzed the spatial distribution features for natural quality of cultivated land in Xiangyun County from the town-scale,village-scale and patch-scale adopting the methods of statistical analysis and spatial autocorrelation analysis. The results showed that the natural quality of cultivated land among the towns was much different. The average agricultural land grading of towns located in basin was higher than the average level of Xiangyun, which was determined by terrain. Low-low clusters of natural quality of cultivated land were distributed in the south of Xiangyun, which should be key areas of land renovation project. The low-high clusters and high-low clusters should be key areas of cultivated land quality monitoring and verification of update data. Analysis of cumulative probability showed that natural quality of cultivated land was influenced by artificial factors. Expanding the scale of the field and improving supporting facilities through land reclamation engineering can improve the quality of cultivated land.