Dr. Samuel Njoroge is a Project Manager for the 4R Nutrient Stewardship Program at the African Plant Nutrition Institute (APNI) based in Nairobi, Kenya.
Born and brought up in Kenya, Samuel has hands on experience in on-farm research under varied cropping systems, and on the development and use of decision support tools for site specific nutrient management. He holds a PhD in Plant Production Systems from Wageningen University in the Netherlands, and M.Sc. and B.Sc. degrees in Agroforestry Systems and Rural Development, and Environmental Science respectively from Kenyatta University in Kenya.
Before joining APNI, Samuel worked as an Agronomist at the sub-Saharan Africa Program of the International Plant Nutrition Institute (IPNI) for seven years. At IPNI, Samuel led the implementation of 4R Nutrient Stewardship Projects in Eastern Africa, and participated in the development and evaluation of decision support tools for site-specific nutrient management in smallholder farming systems of sub-Saharan Africa.
Prior to joining IPNI, Samuel worked for four years as a Research Assistant at the Kenyan office of the International Centre for Tropical Agriculture (CIAT). At CIAT, he was involved in projects aimed at understanding patterns of crop yield responses to nutrient applications in smallholder farms of sub-Saharan Africa.
Samuel’s main research interest revolve around understanding and explaining variations in crop yield responses to nutrient applications under smallholder farming systems, and in developing simplified decision support tools that help farmers sustainably enhance crop productivity through improvements in crop and nutrient management at the farm level.