Dr. Duiker is Soil Management Specialist at Penn State since 2000. His work on development of sustainable no-tillage systems contributed to the increase in no-tillage from 23% of planted acres in 2004 to 66% today in Pennsylvania. His work on no-till systems is helping farmers to use cover crops and more diversity in their crop rotations. His work on cover crops has included evaluations of cover crop species, planting dates,  nitrogen value, and different cover crop management options (among which planting green). He is currently involved in studies on integration of grazing in no-till systems as a way to increase soil health and profitability.