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土壤物质的迁移聚积和扩散强度是人口引力场的函数,引力半径恒大于扩散半径,扩散强度是同心圆规律递减,从而指出了地球表面土壤物质斑点状浓集边界的存在,正是这个规律决定了城市土壤的形成和分布。城市土壤的分类,既可进行解释性分类和因素一生态分类,对典型城市土壤也可进行实体分类,但其实质是土壤自然人工体的实用分类,根据土壤的利用情况和经济生态功能,可分为市区土壤,近郊土壤和远郊土壤三大类型。成为系统土壤学的主要研究对象。
The migration, accumulation and diffusion intensity of soil material are a function of population gravitational field. The gravitational radius is always greater than the diffusion radius, and the diffusion intensity is a concentric decrement, indicating that the speckled boundary of soil material on the earth surface exists. It is this law that determines The formation and distribution of urban soils. Urban soil classification, both for explanatory classification and ecological classification of factors, the typical urban soil can also be an entity classification, but its essence is the practical classification of soil natural artificial body, according to the utilization of the soil and economic and ecological functions, Divided into urban soil, suburb soils and outer soil three major types. Become the main research object of system soil science.