因这种碱化土壤的改良难度较大，而目前从事此项工作的研究的又很少，使这相当数量的土地被常期撩荒。

Because It is more difficult to be improved and now the study for alkaline soil is also few, much land is long abandoned.

youdao

因这种碱化土壤的改良难度较大，而目前从事此项工作的研究的又很少，使这相当数量的土地被常期撩荒。

Because It is more difficult to be improved and now the study for alkaline soil is also few, much land is long abandoned.

youdao