固原山旱地区农民,在长期的生产实踐中,积累了一套巧耕耘、巧安排的作物輪作倒茬經验。解放以来,特别是大躍进和人民公社化以来,随着生产关系的改变,在輪作倒茬方面又有了新的发展。为了繼承和发揚这些经验,促进农业增产,我们对固原山旱地区的输作倒茬作了調查,現在分述如下。 In the long-term production practice, peasants in Guyuan Mountain-arid area have accumulated a set of skillful crop rotation arrangements. Since the liberation, especially since the Great Leap Forward and the people’s communes, new changes have taken place in the rotation of crops as the relations of production have changed. In order to inherit and carry forward these experiences and promote agricultural production increase, we conducted a survey on the up-conversion of Guyuan Mountain and Drought Areas, and are described as follows now.