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- W3194595688 abstract "清朝入关伊始,黄河上游区域人口稀少,在河西走廊、宁夏平原、河湟谷地以及其他地方分布着大量的可耕地可供开发和利用.清政府采取了减免赋税,贷给农民耕牛、籽种和鼓励移民垦荒等一系列行之有效的措施,使黄河上游区域可耕地得到了垦辟.一方面使黄河上游区域的耕地面积有了大幅度的扩大,人口增长迅速,推动了社会经济的发展;另一方面,黄河上游区域大面积的森林遭到了砍伐,耕地沙漠趋势越来越严重和沙尘天气频频发生,水土流失严重,导致了黄河上游区域生态环境日益恶化." @default.
- W3194595688 created "2021-08-30" @default.
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- W3194595688 date "2009-01-01" @default.
- W3194595688 modified "2023-09-24" @default.
- W3194595688 title "Exploitation and use of cultivated-land in the area of upper reaches of Huang River during the early period of Qing dynasty" @default.
- W3194595688 hasPublicationYear "2009" @default.
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