我区丘陵山地约1020万亩,占总耕地面积的70%.这类土壤土体厚度从几厘米到几米,差异很大.其中很多是土体薄、土质差、产量低而不稳,被称为“一层皮”的山岭薄地.如所周知,土体过于薄了成不了高产稳产田,但过厚,实际生产中既不易办到,增产效率也不大.因此,摸清在一定土质条件下构成高产稳产田的剖面层次及适宜的土体厚度,就成为农田基本建设中一个重要研究课题. I hilly area of ​​about 10200000 acres, accounting for 70% of the total area of ​​arable land.Such soil soil thickness from a few centimeters to a few meters, very different.Many of them are thin soil, poor soil, low yield and instability, was Known as “a layer of skin,” the thin mountains.As we all know, the soil is too thin can not become a high and stable yield of land, but too thick, the actual production is not easy to do, production efficiency is not big.So find out in a certain Under the condition of soil quality, the section level and the suitable soil thickness which make the high and stable yield farmland become an important research topic in the farmland capital construction.