甘肃农业大学农耕特色库

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西部干旱地区农户旱地种植行为实证研究: 作者： 叶晶晶 来源： 南京农业大学 年份： 2010 文献类型： 学位论文 关键词： 农户旱地水资源决策干旱风险; 描述： ncentrated v}}ith 85% of the total dry lands. and it is important for the national economy and the countr<0's strategic agricultural growth. Northwest arid areas basically depend on natural precipitation. water shortage has seriously affected the farmers practices. The decision of farmers to plant dry land is a two-stage decision-making behavior: They first have to decide whether to plant dry land, and then decide what kind of crops planted in the dry lands. It is essential to find effective ways to raise the enthusiasm of farmers planting and reasonable arrangements for dry land crop structure. However. ver}} few people study dry land farming practice from the perspective of water shortages.; 全文：。第四章首先根据前人的理论成果经过提炼提出了本文的研究假说,然后介绍了模型的选择和变量的定义,分析了变量的预期影响效果,然后分别利用二元选择Probit模型和多元排序选择Ordered Probit模型

干旱半干旱地区农田灌溉节水治理模式及其绩效研究: 作者： 刘涛 来源： 南京农业大学 年份： 2009 文献类型： 学位论文 关键词： 灌溉效率用水者协会制度建设自主治理; 描述： the world's resource is 6%, but the average water resource to the world's average level is just 1; 全文：中国面临着严重的水短缺问题,尤其是西北干旱半干旱地区。我国淡水资源总量占全球水资源的6%,但人均占有量仅为世界平均水平的1／4、美国的1／5,在世界上名列121位,是全球13个人均水资源最贫乏的国家

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