Purdue Improved Cowpea Storage Bags Demonstration (IMAGE) Purdue University Caption Purdue Improved Cowpea Storage bags are opened during a May 2011 ceremony in Pala, Chad. The hermetic grain storage bags have allowed farmers in Africa to safely store their cowpea grain so they can sell their crop well beyond harvest. Credit Purdue Agricultural Communication photo/Beksoubo Damienne Usage Restrictions None 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.