Cover crop field (IMAGE) American Society of Agronomy Caption Conventional rice cultivation system (left), under plowing and heavy disking and winter fallow; and integrated crop-livestock system (right), under no-till and cattle grazing in winter season in a Brazilian subtropical region. Credit Luiz G. Denardin Usage Restrictions For use with story 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.