Proso (IMAGE) American Society of Agronomy Caption Proso millet growing in western Nebraska, which is believed to have been one of the earliest domesticated crops. It's grown in the developing world as a food source and in the US and Europe for forage and bird seed. Credit Santosh Rajput Usage Restrictions 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.