After a fantastic fall for cover crop growth, cereal rye is up and growing around the state. Over the next month, it will be time to turn that green carpet brown and plant the cash crops. But when is the optimal termination date? Currently, many farmers play it safe by terminating two to three weeks before planting time, hoping to limit the chance that a cover crop might decrease the yield of their subsequent cash crop.
Some farmers, however, are finding they can let their cereal rye cover crop continue to grow right up to - and even after - soybean planting time. These farmers have been conducting on-farm research with Practical Farmers of Iowa to determine the best time to terminate cover crops ahead of soybeans.