Dingxi prefecture is located in foothill of the Loess Plateau, where the climate is arid or half-arid. Due to the intrinsic atrocious eco-environment, Dingxi prefecture has been facing the vicious cycle of eco-environmental vulnerability and poverty for a long time. At the same time, in the long-time practice, Dingxi has taken the rainwater collection and water-saving irrigation as the link for improving eco-environment and increasing field's productivity, and energetically developed ...
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