Soil grain grade composition of soil physical and chemical properties of influence,this is the method of using BiChongJi southwest area into several rock soil (purple soil,lime soil,volcanic dust) grain grade.Some conclusions:
Southwest area into rock (soil,lime,purple soil and volcanic dust particles in the sand,which accounts for more than viscous grain powder,small proportion.
2 the same soil layer,due to the different leaching deposition etc,on the effect of soil layer of grain composition class there are differences of sand soil,black limestone and clay content with the increase of depth and increased.And the sand and volcanic ashes viscous grain content decreased with depth.
3 the soil due to different locations eluviation weathering,the influence of human activity and the degree of different level,the soil grain composition there is some difference.
4 different soil layer,due to the different soil of rock,soil contains sand development of sandstone and mudstone limestone,development of viscous grain rock.
5 the same soil types,different sub-types of soil particle composition is different,but the trend is similar.
Keywords:rock into the soil,The soil profile,Grain grade,Determination