Do reactive interfaces cause low nitrate concentrations in agricultural tile drainage waters at the beginning of storm hydrographs?

Lisa R Welp, Purdue University, Department of Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States, Greg Michalski, Purdue University, Earth, Atmospheric & Planetary Sciences, West Lafayette, IN, United States and Adriana Brown, Purdue University, Earth, Atmospheric, and Planetary Sciences (Undergraduate), West Lafayette, United States