Robert B. Young1, Shani Avneri-Katz2, Amy M. McKenna3, William Bahureksa4, Tamara Polubesova2, Benny Chefetz5 and Thomas Borch6, (1)Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, (2)Department of Soil & Water Sciences, Hebrew University of Jerusalem, Rehovot, Israel, (3)National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, (4)Department of Chemistry, Colorado State University, Fort Collins, CO, (5)PO Box 12, Hebrew University of Jerusalem, Rehovot, ISRAEL, (6)Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, US