The surface soil and the unconsolidated mantle rock beneath it form only a thin venner . 地表土壤和它下面的未固結(jié)的風(fēng)化層只是形成一個(gè)很薄的蓋層。
In loessal regions and alluvial valley fills of the western united states, both surface soil and subsoil are commonly friable . 在美國(guó)西部黃土區(qū)和沖積河谷里,表土和底土一般是容易破碎的。
Early diagenesis in surface soil of yellow river delta 黃河三角洲表層土壤早期成巖作用初探
Standard practice for sampling surface soil for radionuclides 放射性核素表面土壤取樣的標(biāo)準(zhǔn)實(shí)施規(guī)程
Further confusing the issue were high surface soil tests for k 表層土壤鉀測(cè)試值高又進(jìn)一步混淆了問(wèn)題。