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.
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.
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.
所以，爬山虎对光照强度的适应范围较广，具有较强的抗旱性而不适应高土壤水分环境，是适用于干旱瘠薄荒山植被恢复的优良藤本植物。
It has the property of strong drought-resistance but can not stand the high soil moisture environment. Therefore, it is a suitable liana to the afforestation in barren mountain area.
利用生态学原理对灌木林的土壤物理性状、水文效益、抗旱性能进行分析研究，得出在干旱瘠薄山地灌木资源的扩大利用有广阔的前景。
The principles of ecology are used to analyse physical properties of soils in shrub forests, hydrolic benefits and drought resistances thereby to conclude…
利用生态学原理对灌木林的土壤物理性状、水文效益、抗旱性能进行分析研究，得出在干旱瘠薄山地灌木资源的扩大利用有广阔的前景。
The principles of ecology are used to analyse physical properties of soils in shrub forests, hydrolic benefits and drought resistances thereby to conclude…
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