The main reason is the serious soil erosion , the high comparison sloping farmland and the traditional may of planting 究其原因，主要是该地区水土流失严重，坡耕地比重高，一直采用传统的广种薄收的种植方式。
2.
And the production fluctuation caused by climate changes lead to local farmers to take some unwilling but practical measures such as harvesting a little with cultivating extensively , planting dispersedly and irrigating with wells , combining herbage meadows with woody ones , in the years when disaster happened increasing output of livestock which has become fully - grown and ready for slaughter and planting fast growing and early trees 气候波动引起巨大的农牧业生产波动，导致了农牧民的广种薄收、分散种植、打井灌溉等行为，以及他们采取草本草场与木本草场结合、灾年加大出栏率和栽植速生树种、可平茬树种等资源利用和避灾措施。
