Seeder (2 of 2) (image) Penn State Caption A device designed by Penn State agricultural scientists that can plant seed, add herbicides and spray fertilizer in a single trip improved the yield of a cornfield during a recent test. Farmers could potentially reduce the number crop rotations and the cost of fertilizers by using this multipurpose seeder that can create a healthy cover crop during the planting season. Credit Patrick Mansell, Penn State Usage Restrictions Noncommercial use only 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.