TY - RPRT TI - Relation of landscape position and irrigation to concentrations of alachlor, atrazine, and selected degradates in regolith in northeastern Nebraska AU - Ingrid M. Verstraeten AU - D. T. Lewis AU - D. L. McCallister AU - A. Parkhurst AU - E.M. Thurman PY - 2009 DO - 10.1021/bk-1996-0630.ch015 UR - https://pubs.usgs.gov/publication/70017769 ID - 70017769 ER -