Nitrogen

Courtesy of the University of Vermont

Many researchers have looked at nitrogen pollution hotspots around the country. But a new first-of-its-kind, multi-year study from the University of Vermont looks at areas where nitrogen pollution reduction is most feasible without affecting crop yield.

 

Amy Mayer / Harvest Public Media

Consumers are buying more certified organic fruits and vegetables every year, and in the Midwest and Plains states, much of it is grown on small farms.

To comply with organic rules, some use livestock to provide natural fertilizer. Two separate studies in Iowa are trying to quantify the soil health, yield and, eventually, economic impact of grazing animals on the fields after vegetables are harvested.