Planting (image) Penn State Share Print E-Mail Caption Planting green involves planting main crops into living cover crops. An example shown here: Cereal rye is rolled and soybeans planted green in the same pass at Penn State's Russell E. Larson Agricultural Research Center. Credit Heidi Reed/Penn State Usage Restrictions non commercial use only Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.