The quality of water in Kentucky's agricultural watersheds has received considerable attention in recent years. The main concerns in corn production areas usually center on water content of nitrate-N from commercial fertilizer and triazines from herbicide applications. Although N can be found naturally in Kentucky soils, it cannot supply all the N that corn needs to produce optimum yields. Therefore, fertilizer N is added to ensure ample nutrition. Triazines, on the other hand, do not occur naturally in the soil but are applied to the soil to effectively control weeds. Most commonly, these herbicides are applied at the time of corn planting.
Reber, Larry and Potts, John, "A Two Year Evaluation of Nitrate-N and Triazine Herbicides in Groundwater and Surface Water of an Intensively Row Cropped Agricultural Watershed in Western Kentucky" (1998). Soil Science News and Views. 101.