晋南全区一九六一年有小麦九百四十点三万亩,其中旱地麦七百七十六点三万亩,占麦田总面积的82.6%,而旱地麦的产量一般只占小麦总产量的60—65%。因此旱地麦田产量的提高对全区小麦增产起着决定性作用。据我们调查研究,旱地麦田产量低而不稳的主要原因有两个:一是土地肥力不 In 1961, Jinnan Prefecture had 940,300 hectares of wheat, of which 776,300 hectares were wheat in dry land, accounting for 82.6% of the total area of ​​the wheat field, while the output of wheat in dry land was generally only wheat 60-65% of the total output. Therefore, the improvement of dryland wheat yield will play a decisive role in the increase of wheat yield in the whole region. According to our investigation and study, there are two main reasons for the low and unstable yield of dryland wheat fields. First, the land fertility is not