Agricultural non-point source pollution is mainly induced by the excess matter accumulated in soil

when the exogenous substances are beyond soil environmental capacity and nutrients are beyond the need of plant growth. Based on the analysis of soil physical and chemical properties in different land uses

clay particle content

pH

organic matter

total nitrogen

total phosphorus

hydrolysis nitrogen

and available phosphorus were chosen as indexes and forest soil was taken as control. Grey relation principle and method were used to analyze soil pollution and its distribution in different land uses

different planting patterns

and different distances from residential areas. Analyses indicate that by soil pollution ratio

cultivated lands are in the order of paddy fieldvegetable landupland and soils are in the order of farmland pollution with two-maturity per yearsignal harvest. The shorter distance from a residential area

the heavier soil pollution is.