DETERMINING ENVIRONMENTAL FACTORS CONTROLLING NITROGEN CYCLING IN THE SEMI-ARID RIO GRANDE USING NITROGEN AND OXYGEN ISOTOPES

Diego Alberto Sanchez1, Anna Szynkiewicz2 and Anthony M Faiia1, (1)University of Tennessee, Knoxville, TN, United States, (2)University of Tennessee, Department of Earth and Planetary Sciences, Knoxville, TN, United States