Soil erosion has been checked in a total area of 67 million hectares, and a great number of water and soil conservation projects have been completed, making eroded soil decrease by 1.1 billion tons every year and water conservation capacity increase by 18 billion cubic meters.
Over-exploited water resources, deforestation and inappropriate cultivation of grasslands have dried up lakes and eroded soil.
In the plot experiment on runoff, the loss of water, soil and fertilizer and the characteristics of contour terrace, grass wasteland and eroded soil were studied.
