黑土

They mixed the sand with the black clay.

他们把黑土掺上沙子。

When the black topsoil was all washed away, farmers moved westward and started new plantations.

当表层黑土全部被冲走之后， 农民们就向西部转移，建立新的种植园。

Onions and rice grow in the black soil of the delta.

洋葱以及稻米生长在三角洲附近的黑土里。

The depression of ground are covered with black and fertile soil , where the vegetation is vigorous.

凹地上覆盖着一层肥沃的黑土， 植物长得茂盛。

Big black soil , loess and sand rock and soil, mostly acidic, fertile osteoporosis.

土壤有大黑土，黑黄土、沙岩土， 多呈酸性， 疏松肥沃。