用大量秸秆残茬覆盖地表是保护性耕作的主要特征之一。

Using many straws to cover the earth is one of main character of protection cultivation.

youdao

用大量秸秆残茬覆盖地表是保护性耕作的主要特征之一。

Using many straws to cover the earth is one of main character of protection cultivation.

youdao