Collections > Electronic Theses and Dissertations > Using remote sensing to calculate plant available nitrogen from industrial hog CAFOs in North Carolina at the sprayfield and sub-watershed scales

Duplin county, NC has the highest hog-population density of any county in the United States. Liquid manure from industrial-sized hog concentrated animal feeding operations (CAFOs) is stored in open-air lagoons and sprayed onto sprayfields as fertilizer. Hog CAFOs are regulated by the NC Department of Environment and Natural Resources (DENR) based on their ability to have nutrient management plans (NMPs) that have balanced plant available nitrogen (PAN) so that the estimated portion of nitrogen that remains available for crops to use after irrigation is absorbed. Objectives of this research are to quantify the difference in permitted PAN between CAFO point and sprayfield area locations at two sub-watershed scales in Duplin county by conducting a review of all 485 active CAFOs and creating a sprayfield spatial database. Second, a new method incorporating remote sensing data identifies annual PAN for crops on sprayfields and two sub-watershed scales in Duplin county between 2010-2014.