研究结果指出，由于流域土地利用不合理，管理措施不当，土壤侵蚀和土地沙化严重，土壤瘠薄，农业生产水平很低。

The results show that there are serious soil erosion and desertification and extensive land degradation in this catchment because of irrational land use and improper managements.

youdao

世界范围内，相当一部分玉米种植在十分瘠薄的土壤上，氮素缺乏成为玉米生产最重要的限制因子之一。

In the world wide, most of maize was planted in poor soil, and nitrogen is one of most important nutrition elements for maize growing, especially for maize yield.

youdao

这里植被稀少，土壤瘠薄，干旱少雨，自然灾难频繁。

Here vegetation is exiguous, edaphic barren, drought little rain, natural disaster is frequent.

youdao