Spatial Variability of Soil Organic Matter in Microtopography of Mid-Sichuan Hilly Region

By the method of soil sampling and laboratory analysis, analysis of spatial variability of soil organic matter in microtopography of Mid-Sichuan Hilly Region had been characterized discussed. The results indicated, that there was a tendency among different landscape position. The order is: foot slope lower slope upper slope middle slope hilltop. For slope shape, soil organic content order is:Plan-convex slope plan-linear slope plan-concave slope. Among different slopes, there was a tendency: with the increase of slope reduced soil organic matter content. There was little difference in soil organic matter among different slope aspects, but there was a tendency that soil organic matter in northern aspects was higher.