Trey Hill and his father own Harborview Farm on the Eastern Shore of Maryland, where they grow corn, soybeans and wheat. He has been growing cover crops for 20 years, and in the last few years has been planting them on all of his acreage.

He experiments with triticale and cereal rye, but his key cover crops are wheat and barley. Hill describes how he recently switched to planting his cash crops into standing cover crops rather than first terminating the cover crop. This change - giving the cover crop more time to grow and getting better corn emergence - has led his no-till yields to finally match conventional yields.