Single-Species Cover Crop Shines at Weed Suppression

Multi-year field research published in the journal Weed Science showed that weed biomass dramatically declined as cover crop biomass and diversity increased. However, this research by Agriculture and Agri-Food Canada found that monocultures of buckwheat, oat, pearl millet, or sorghum sudangrass were typically more productive and more weed suppressive than the average mixture. “If weed suppression is the primary goal, consistent evidence suggests that a single, high-performing cover crop may be the most effective option,” says Andrew G McKenzie-Gopsill, Ph.D., a research scientist with Agriculture and Agri-Food Canada.