Corn Height Comparison (image) American Society of Agronomy Share Print E-Mail Caption This is a straw mulch plot (left) and plastic mulch plot (right). Plastic mulch holds more soil water and increases corn yield compared to straw, but straw mulch is better for improving soil health. 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.