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Potential and Limitations of Management Practices to Reduce Nutrient Losses
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 074-079 in Total Maximum Daily Load (TMDL) Environmental Regulations–II Proceedings of the 8-12 November 2003 Conference (Albuquerque, New Mexico USA), Publication Date 8 November 2003. .(doi:10.13031/2013.15540)
Authors: J. L. Baker
Keywords: water quality, nitrogen, phosphorus, best management practices, tillage, cropping, fertilizer, manure, hydrology, subsurface drainage, nonpoint pollution
Nonpoint source water quality concerns from nutrients lost from agricultural lands with surface
runoff and subsurface drainage involve both human health and the integrity of aquatic
ecosystems. Listing by states of impaired waters, relative to designated uses, illustrate that
nutrient losses to both standing and flowing waters are a major cause of water quality problems.
To solve these problems, the U.S. EPA is requiring states to develop practices/systems, and plans
to implement them, through TMDLs. States are also being required to develop nutrient criteria
for standing and flowing waters to be part of new standards that are protective of current and
future uses. There are concerns as to whether the current suite of management practices will be
adequate to meet the challenge.