Analysls showed that 70% dust of sandstorm originated from cultivated land of surface uncovered and loose, the biggest root of producing was plough share tillage.

• 通过对沙尘暴起因及危害的分析,表明沙尘暴70%25来源于表面裸露疏松的耕地,而铧式犁是造成这一结果的最大根源。