And the boundary of them has the same lithologic character: the ravinement surface of river course or exposure mudstone of flooding plain and root clay.

二者的界面是相同的，均为河道砂体底部的冲刷侵蚀面或者是暴露过泛滥平原泥岩、根土岩等。

youdao

Is the existing root zone high in silt and clay?

当前的根系层是否高含淤泥和粘土？

youdao

The utility model relates to a blackland and clay root and stem crop ditch loosening machine for loosening soil.

本实用新型涉及一种疏松土壤的黑粘土地根茎作物沟土疏松机。

youdao

The region's hard-packed clay soil welcomes a unique mix of plants with deep-penetrating root systems.

WSJ: Meadows Instead of Lawns Are in Fashion in Residential Landscaping