Biases in the spatial estimation of pesticide loss to groundwater Yves Coquet, Dalila Hadjar, Jean-Marc Gilliot, Marie-Paule Charnay, Julien Moeys, Alexandre Dufour and Nicolas BeaudoinAgron. Sustain. Dev., 25 4 (2005) 465-472DOI: https://doi.org/10.1051/agro:2005046