National Water-Quality Assessment (NAWQA) Program
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Using Chemical, Hydrologic, and Age Dating Analysis to Delineate Redox Processes and Flow Paths in the Riparian Zone of a Glacial Outwash Aquifer-Stream System
By Larry J. Puckett, Timothy K. Cowdery, Peter B. McMahon, Lan H. Tornes, and Jeffrey D. Stoner
[Water Resources Research, vol. 38, no. 8, August 2002]Figure 3. Nitrogen application in commercial fertilizer in Otter Tail County since 1945 (a) on an annual basis, and (b) cumulative inputs during the same period.
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