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Cover cropping to reduce nitrate loss through subsurface drainage in the northern U.S. corn belt.

P. Porter, J. Strock, J S Strock, 2004, Journal of environmental quality.

Alfalfa rapidly remediates excess inorganic nitrogen at a fertilizer spill site.

B. Miller, C. Vance, J. F. Lamb, 2001, Journal of environmental quality.