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Federal
Time lags in watershed nitrogen and phosphorus input-output balances: A forty-four year record of the Willamette River Basin recent views
U.S. Environmental Protection Agency —
The following 4 tables accompany the peer-reviewed journal article GS Metson, J Lin, JE Compton, JA Harrison. "Where have all the nutrients gone? Long-term Decoupling... -
Federal
Linking terrestrial phosphorus inputs to riverine export across the US recent views
U.S. Environmental Protection Agency —
Phosphorus inputs to the landscape from fertilizer and manure inputs, P surplus and P removal by crop harvest and hydrologic export. The input layers are now... -
Federal
Consumer-oriented phosphorus and nitrogen footprints for the U.S. recent views
U.S. Environmental Protection Agency —
The P footprint approach described here emulates the N footprint approach described by Leach et al (2012), with updated (circa 2013-2015 ) values for N from Leach et...