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在南部大平原的棉花产区,风蚀较为严重.秋季在休闲行播种覆盖作物可减轻风蚀.在1984年和1985年的9、10.11月分别播种了冬小麦、冬大麦、冬燕麦、冬黑麦、冬黑小麦、饲料高粱、珍珠稗、两种春黑小麦、3种春燕麦、3种春大麦和一种冬豌豆等16种作物,调查分析了地面覆盖度、植株高度及1～2月化学除草后地面覆盖的损失率.9月播种,各种作物在1月都能很好覆盖地面或达到一定的生长高度防止土壤侵蚀;10月播种,只有饲料高粱和珍珠稗两种作物表现较差;11月播种,则没有一种作物能很好覆盖地面.就以最少的土壤水分利用而最大限度地保护土壤而言,3种春大麦最好;饲料高粱和珍珠稗如果在9月初播种.表现也较好.9月播种的作物,除3种小谷类外,其它品种在化学杀除地面覆盖后,5月中旬覆盖率仍有60%以上;10月播种,只有冬大麦和春黑小麦在5月中旬覆盖率大于或等于50%.
Wind erosion is more severe in the cotton producing areas of the southern Great Plains, and wind erosion is mitigated by sowing crops at recreational lines in autumn. Winter wheat, winter barley, winter oats, winter rye, Winter wheat, forage sorghum, barnyardgrass, two kinds of spring wheat, three kinds of spring oats, three kinds of spring barley and a winter pea were investigated. The effects of ground cover, plant height, Weeding loss rate of ground cover. Seeding in September, a variety of crops in January can well cover the ground or reach a certain height to prevent soil erosion; sowing in October, only feed sorghum and barnyard pearl two crops performed poorly ; No crop was found to cover the ground well in November and the three spring barley varieties were the best for soil conservation with minimal soil water use and sowed sorghum and barnyardgrass if sown early in September. September crop seeding, in addition to three kinds of small grains, the other species in the chemical to kill the ground coverage, the mid-May coverage is still more than 60%; October seeding, only winter barley and spring black wheat In mid-May coverage is greater than or equal to five 0%.