Regional Nutrient Balances

Phosphorus Balance Trends on Agricultural Soils of the Lake Erie Drainage Basin (North America)
Laura Bast, Robert Mullen, Ivan O’Halloran, Darryl Warncke, and Tom Bruulsema

Ontario Crop Nutrient Balance, 1950-2007

Mid-Atlantic States N&P (U.S. Land Grant Colleges and Universities' Mid-Atlantic Regional Water Program)

Nutrient Budgets in North America (PE Fixen and AM Johnston)

NUTRIENT BALANCE IN THE WESTERN U.S. (RL Mikkelsen)

Nutrient balance in the Great Plains region (WM Stewart)

Past and future phosphorus balances for agricultural cropland in New York State
(S.N. Swink, Q.M. Ketterings, L.E. Chase, K.J. Czymmek and J.C. Mekken)