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三、防治土壤侵蚀的措施(一)丘陵沟壑风蚀区的水土保.持措施如上所述,丘陵沟壑风蚀水蚀区,千沟万壑,地多陡坡,旱涝不均且多暴雨,加之不合理的人为活动,造成了严重的水土流失,当地群众为了保持水土,提南作物产量,采取了以下的措施:1.农业改良与水利改良土壤措施(1)修梯田:全专区至1968年9月底,已于缓坡地上修起坡式梯田344万多亩,至1959年5月底完成水平梯田480,768亩,前者多分布在10—30度的坡地和少部分的梁峁顶上,后者多分布在5—25度的坡地内(有的还修在坡式梯用上),一般都增产20—50%以上.
III. Measures to Prevent and Control Soil Erosion 1. Measures for Soil and Water Conservation in Hilly and Gully Wind Erosion Areas As mentioned above, the wind erosion and water erosion area of hills and valleys, numerous dikes and steep slopes, uneven rainfall and heavy rains combined with irrational Of the man-made activities, resulting in serious soil erosion, the local people in order to maintain soil and water, Tainan crop production, has taken the following measures: 1. Agricultural improvement and water improvement soil measures (1) to repair terraces: the entire area until the end of September 1968 , Slope-type terraces have been repaired in the gentle slope of more than 3.44 million mu to the end of May 1959 to complete the horizontal terraces 480,768 acres, the former mostly distributed in 10-30 degrees slope and a small part of the top of the beam ridge, the latter mostly distributed in 5-25 degrees slope (some also repair the slope ladder), generally increase 20-50% or more.