Sampson Agyin-Birikorang, International Fertilizer Development Ctr., Muscle Shoals, AL, US, Upendra Singh, Fertilizer Research, International Fertilizer Development Center (IFDC), Muscle Shoals, AL, US, Job Fugice Jr., Fertilizer Research, International Fertilizer Development Center (IFDC), Muscle Shoals, AL, Wendie Bible, Analytical services Lab, Fertlizer Research, International Fertilizer Development Center (IFDC), Muscle Shoals, AL, Joaquin Sanabria, IFDC (International Fertilizer Development Center, Muscle Shoals, AL and Vaughn Henry, Soil and Plant Nutrition, Office of Programs, IFDC, Muscle Shoals, AL