Cowpea Test Field (image) American Society of Agronomy Share Print E-Mail Caption This field on the UC Riverside campus has three different breeding lines of cowpea. Their responses in this water-limited condition are part of their genetic diversity. Credit Timothy Close, UC Riverside. 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.