豫北棉区的棉花种植制度,历来都是一年一熟.据十四年棉田从播种到拔柴的自然平均天数计算,棉株覆盖棉田与棉田冬闲的时间分别为222.1天和142.9天(±8.22天),其时间比为5.9∶3.9≈6∶4,即一年之中,棉田休闲的时间长达5个月左右.这对水肥条件较好,而又人多地少的豫北棉区来说,无论在耕地或在光、热、水、气等自然资源方面,都是一个很大的浪费. According to the natural average number of days from sowing to drawing firewood in fourteen years, the time for winter cotton-free cotton covering cotton fields and cotton fields was 222.1 days and 142.9 days respectively ± 8.22 days), the time ratio of 5.9: 3. 9 ≈ 6: 4, that is, one year, cotton leisure time up to 5 months or so. This water and fertilizer conditions better, and more people less to the north of North In the cotton area, there is a great waste in terms of arable land or natural resources such as light, heat, water and gas.