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从 2 0世纪 70年代就开始的科学研究已经充分论证了改良土壤湿度和提高农业科技含量 (改良种子 ,增施化肥 )导致作物产量的提高 ,不仅可在宏观上维持全面的农产品供应 ,而且还可维持大部分农村家庭的经济收入。因此保持雨水、防治土壤侵蚀成为发展干旱地区农业的中心议题。因为
Scientific studies that began in the 1970s have demonstrated that improving soil moisture and increasing agricultural science and technology (improving seeds and increasing fertilizers) lead to increased crop yields that not only provide a macroscopic supply of a full range of agricultural products but also Maintain the economic income of most rural families. Therefore, maintaining rainwater and preventing and controlling soil erosion have become central topics in the development of agriculture in arid areas. because