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占国土面积21.7%、年降水量250毫米～550毫米的半干旱和半湿润易旱地区,是我国生态环境最为脆弱、农业生产极不稳定的地区,同时也是一个具有较大发展潜力的地区。建国以来,根据我国国情,在这一地区首先抓了基本农田建设和林草建设,这是完全正确的。但相比之下,耕作技术的改进却严重滞后。以典型半干旱的黄上高原为例,虽早已明确,为防止水土流失、搞好综合治理,必须同时抓好生物、工程、耕作三大技术措施,但一些有效的水保耕作法仅在部分地方分散使用,缺乏总体指导和深入研究,迄今尚未形成
The semi-arid and semi-humid and drought-prone areas, which have a land area of 21.7% and an annual rainfall of 250mm-550mm, are the most vulnerable areas in China with extremely unstable agricultural production. They are also areas with great potential for development. Since the founding of the People’s Republic of China, based on China’s national conditions, it is entirely correct to first capture the construction of basic farmland and grass and trees in this area. However, in contrast, improvements in farming techniques have lagged far behind. Taking the typical semi-arid Yellow Plateau as an example, although it has long been clear, in order to prevent soil erosion and improve comprehensive management, we must do a good job in three major technical measures of biology, engineering and farming. However, some effective water conservation tillage practices are only available in part The decentralized use of localities, the lack of general guidance and in-depth research have not yet been established