cover crop field (IMAGE) Penn State Caption Lead researcher Joseph Amsili taking core samples of cover crops at the Russell E. Larson Agricultural Research Center. The study revealed that cover crop mixtures increased total carbon inputs to soil because they simultaneously had high root and shoot inputs and they promoted higher carbon inputs from residues left by the following corn cash crop. Credit Jason Kaye Research Group, Penn State Usage Restrictions non commercial use only License Licensed content 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.