Janice E. Thies1, Dries Roobroeck2, Samuel Were3, Luiza Munyua3, James Agwa4, Jean Bonhotal5 and Willis Okatch6, (1)Cornell University, Cornell University, Ithaca, NY, US, (2)Natural Resource Management Unit, International Institute of Tropical Agriculture (CGIAR), Nairobi, Nairobi, KENYA, (3)Plant Science and Crop Protection, University of Nairobi, Nairobi, Kenya, (4)IITA, Nairobi, Kenya, (5)Cornell Waste Management Institute, Cornell University, Ithaca, NY, (6)Soil and Crop Sciences, Cornell University, Ithaca, NY