USDA research engineers, Mark Williams, discusses some of the study he is conducting on reducing nutrient runoff - work that led to his nomination for a Samuel J. Heyman Service to America Medal (SAMMIE).

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USDA research engineers, Mark Williams, discusses some of the study he is conducting on reducing nutrient runoff - work that led to his nomination for a Samuel J. Heyman Service to America Medal (SAMMIE).

See omnystudio.com/listener for privacy information.