IPNI Analyzes Nitrogen In Corn, Flux Toward Gulf Of Mexico

International Plant Nutrition Institute (IPNI) Nitrogen Program Director Dr. Cliff Snyder informed attendees at the 2012 ASA, CSSA, SSSA International Annual Meetings in Cincinnati on IPNI’s analysis of partial nitrogen balances, corn partial factor productivity for nitrogen, and flux of nitrogen from the Mississippi River Basin to the Gulf of Mexico.

IPNI’s analysis used data for the USDA Agricultural Census years, 1987 to 2007. Partial nitrogen balances were estimated using the Nutrient Use Geographic Information System (NuGIS) developed for the U.S. at the county, state, and 8-digit hydrologic unit level by IPNI. Recent nitrogen flux trends reported by the U.S. Geological Survey for major river sub-basins will also be discussed in relation to these balances.

“Previous work by scientists at the University of Illinois has documented the net anthropogenic nitrogen balance and relationship to the flux of nitrate-nitrogen to the Gulf of Mexico but these reports did not address changes in nitrogen balance or their relation to changes in nitrogen flux across a range of years,” explains Dr. Snyder.

The American Society of Agronomy (ASA), Crop Science Society of America (CSSA), and Soil Science Society of America (SSSA) is hosting more than 4,000 scientists, professionals, educators, and students at the 2012 International Annual Meetings, “Visions for a Sustainable Planet”.

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