亩产一、二百斤的中低产麦田,采用切实有效的措施,是可以使亩产翻一番,达到增产增收目的的。在我国小麦生产中,中低产(亩产一、二百斤)田面积约占二分之一左右。造成低产的原因,主要是旱、薄(包括盐碱地和黄红壤)、粗、晚,在南方还有部分排水不良的湿害地,其中旱薄是最主要的。特别是土壤瘠薄,在北方广大麦区降雨较少而且分布不匀,限制了小麦生产的发展。这类地区过去较侧重于 The yield of one or two hundred catties of low-yielding wheat fields, with practical and effective measures, can double the output per mu to achieve the purpose of increasing production and income. In China’s wheat production, middle and low yield (one, two hundred pounds per mu) field area accounts for about one-half. The causes of low yield are mainly dry and thin (including saline-alkali land and yellow-red soil), coarse and late wetlands with some poor drainage in the south, of which the dry-thin is the most important. Especially the infertile soil, rainfall and uneven distribution in the northern part of the vast wheat area have limited the development of wheat production. In the past, such areas were more focused