Nathan Nelson is a professor of Soil Fertility and Nutrient Management at K-State. A native of Manhattan and an avid outdoorsman, he possesses a strong interest in developing agricultural systems that not only maximize productivity but protect environmental quality as well. This episode covers how and why farmers make the fertilizer decisions that they do and what that means for water quality. Nathan directs the Kansas Agricultural Watershed, or KAW, field laboratory, a unique 18-plot watershed project to better understand how cover cropping and fertilizer application practices impact phosphorus dynamics on no-till fields in Kansas.