白干土(俗称)在土壤发生学来说,属于栗钙土范畴,其中还有下分草甸栗钙土、暗栗钙土、淡栗钙土和栗钙土四个亚类。其中草甸栗钙土、暗栗钙土的碳酸钙淀积层(以下简称淀积层)一般才4—6公分厚,利用价值比较高,多用于农业;淡栗钙土和栗钙土的淀积层一般为20～30公分厚,最厚可达50公分以上,多用于牧业和林业。 White dry soil (commonly known as) in soil genesis, belong to the category of chestnut soil, of which there are sub-sub-meadow chestnut soil, dark chestnut soil, light chestnut soil and chestnut soil four sub-categories. Among them, the calcareous soil of the meadow and the calcium carbonate deposited layer of the dark chestnut soil (hereinafter referred to as the sedimentary layer) are generally only 4-6 cm thick, and have high utilization value and are mostly used for agriculture. The lakes of the light chestnut soil and the chestnut soil Layers are generally 20 to 30 cm thick, the thickest up to 50 cm above, used for animal husbandry and forestry.