Plastic Mulch Between Corn Rows (image) American Society of Agronomy Share Print E-Mail Caption Plastic mulch is often used to keep soil moist in dryland agriculture. However, this cover doesn't feed the soil, leading to decreased soil organic carbon. Credit Jun Wang Usage Restrictions Please use with story 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.