Take the soil granulometric composition data of 8 vegetation types

2 farmlands and 2 rehabilitated land as the foundation

the utilization fractal model are considered as 12 land utilization type soil particles fractal dimension

and this paper studied the relationship between fractal dimension and the soil properties.The result showed that

12 land utilization type surface layer soil particles fractal dimension is between 2.818 5~2.924 9.Every forest soil particles fractal dimension is small comparing with rehabilitated land and the corn field;Compared with the 2.863 3 in 1990

soil fractal dimension 2.859 2 is diminished in 2006.The law of granular fractal dimension is not obvious.Deciding the primo of soil particles fractal dimension is <0.002 mm contents

the contents of 0.05~0.25 mm and 0.002~0.02 mm is second.The order deciding granular fractal dimension: 2~5 mm

0.5~1 mm and 1~2 mm.The particles fractal dimension and the granular fractal dimension may accomplish the index of soil erosion

the latter may store water as penetration more index.Rehabilitated land has more beneficial to soil fractal characteristic about water and soil conservation than forestation in degraded land.