Richard P. Dick1, Ibrahima Dhidhiou2, Ekwe Dossa3, Fred Kizito4, Spencer Debenport5, Matthew Brighrt6, Nathaniel Alexander Bogie7, Chelsea DeLay8, Lydie Lardy9, Komi Assigbetse10, Yacine Ndour11, Modou Sene12, Amianta Bdadiane13, Brian Mcspadden-Gardener5 and Teamrat A. Ghezzehei14, (1)School of Environment and Natural Resources, The Ohio State University, Columbus, OH, (2)University of Thies, Thies, Senegal, (3)International Fertilizer Development Center, Washington, DC, (4)106 Veihmeyer Hall, University of California-Davis, Davis, CA, US, (5)The Ohio State University, Wooster, OH, (6)The Ohio State University, Columbus, OH, (7)California, University of California-Merced, Berkeley, CA, (8)School of Environment and Natural Resources, The Ohio State University Research Foundation, Columbus, OH, (9)Institute of Research for Development, Marseille, France, (10)Institut de recherche pour le développement, Dakar, Senegal, (11)Institute of Research for Development, Dakar, Senegal, (12)Institut Senegalais de Recherches Agricole, Dakar, Senegal, (13)African Resources Group, Dakar, Senegal, (14)School of Natural Sciences, University of California-Merced, Merced, CA, US