Annual ryegrass is an accepted cover crop in parts of the midwestern United States for corn and soybean production. Cover crops help prevent soil erosion, improve soil tilth, increase soil organic matter, and capture nutrients subject to leaching or runoff losses. Annual ryegrass used as a cover crop is characterized by quick establishment in overseeding, drilling, and broadcast applications if temperature and moisture conditions are favorable. In addition, annual ryegrass is especially noteworthy for developing a deep root system that helps improve the rooting depth of subsequent corn or soybean crops (Plumer et al., 2017).