Elliott, J.A.Best, K.B.Nicholaichuk, W.Cessna, A.J.Grover, R.Toleffson, L.C.2018-09-142018-09-141992-02-20http://hdl.handle.net/10388/10563The potential for contamination of groundwater by nitrates or pesticides from irrigated soils has not been fully evaluated. This project was initiated to monitor nitrate and herbicide leaching in a tile-drained field at SIDC in Outlook. Water samples were collected using suction lysimeters and analyzed for nitrate and four herbicides (2, 4-D, dicamba, bromoxynil and diclofop). The concentrations of nitrates at depth were maintained by the downward movement of applied andmineralized N. Trace amounts of 2, 4-D and diclofop were leached to 180 cm but bromoxynil and dicamba were not found below 60 cm depth. Dicamba and diclofop persisted longer in the soil than 2, 4-D or bromoxynil but were only present in trace amounts at the end of August.enAttribution-NonCommercial-NoDerivs 2.5 CanadaPresentation