As the planting season progresses, many cover crops and weeds continue to grow. Letting cover crops grow may reduce soil moisture, improve soil structure, reduce dust storms, and add soil carbon. Crop rollers naturally kill cover crops by mechanically terminating (crimping) them. Crimpers are used to kill grass cover crops (cereal rye, oats, barley, whet, millets, sorghum species), vetches (hairy, common), annual clovers (crimson and balansa), brassicas (kale, rape), buckwheat, sunflowers, and multi-species cover crops. Crimpers do not work well with perennial cover crops like red clover, alfalfa, or annual ryegrass. Best results when the heads or flowers are in the “boot” or head stage, when mechanically crushing cover crop stems kills them. Crimping advantages include suppression of weeds by forming a natural mulch, reduced summer soil temperatures, it conserves soil moisture, decreases soil erosion, adds organic matter, and reduces blowing soil. Crimping cover crops works well...