Topics /

Promoting 4R Nutrient Stewardship in Africa

To effectively communicate the 4R practices appropriate in SSA and develop a suitable fertilizer management knowledge dissemination framework, we have initiated a pilot project to be implemented over a 4-year period in pilot sites in Western Kenya. The region with high potential for intensification, but characterized by large yield gaps. Funded by the Fertilizer Industry, the project aims to fill the gap of limited access to plant nutrient management information by farmers. The project has developed field-based learning centres for farmers, extension agents and agrodealers facilitated through demonstrations various 4R practices. The project is also developing extension material and using radio programs and ICT platforms to communicate 4R information to farmers. The 4R knowledge dissemination framework developed will be used as a model for scaling out to other regions in SSA.

List Grid
4R An overview of the Nutrient Stewardship context in sub Saharan Africa

Smallholder farms in SSA are heterogenous in soil fertility and 4R Nutrient Stewardship provides a basis for managing this variability to increase nutrient use efficiencies.

4R Demonstrations

Multi-location demonstrations have been established in Western Kenya. The demonstrations are giving insights into the relative importance of N, P and K in crop production, while also addressing the Ri ...

4R Extension Handbook for Smallholder Farming Systems in Sub-Saharan Africa

Download the PDF, or write to the IPNI SSA regional office (email:; to request a free copy.

4R Knowledge Products

A series of extension products targeted at both extension officers and farmers have been developed in partnership with various institutions in East, West and Southern Africa

4R Nutrient management: the impact of balanced nutrient application

As the 4R nutrient stewardship project marks its first year of operations in Western Kenya, the impact of balanced nutrition on crop growth and productivity has been a major highlight to farmers and o ...

4R Nutrient Stewardship Adoption in Sub-Saharan Africa: Challenges and Opportunities

Dr. Shamie Zingore, IPNI Director, Sub-Saharan Africa Program, leads us through the region’s current challenges and discusses the limitations of smallholder farming systems and their surrounding infra ...

4R Nutrient Stewardship Project featured in ASHC and CGIAR research and development highlights

In recognition to the impact of the 4R Nutrient Stewardship project in Western Kenya the African Soil Health Consortium (ASHC) and the CGIAR Research Program on Maize have featured the project in rece ...

4R nutrient stewardship work featured at UNEP’s Global south to south development expo

The ongoing project on the promotion of effective 4R practices for SSA in Siaya County of Western Kenya has been featured as a case study ...

4R Training

Field based training is a key component of the dissemination of 4R nutrient stewardship knowledge


Over fifty agrodealers from major towns in Siaya County of Western Kenya were recently trained on the 4Rs of fertilizer use during a one day workshop organized by IPNI and the Siaya County Department ...

Introducing the 4R Nutrient Stewardship Concept to Smallholder Farming Systems of Sub-Saharan Africa

Dr. Shamie Zingore, IPNI Director, Sub-Saharan Africa Program discusses how the 4R Nutrient Stewardship concept can be specifically adapted to smallholder farming systems. The key role that appropriat ...

Strengthening linkages with local institutions of higher learning

In an effort to further strengthen the existing linkages between local institutions of higher learning and IPNI, the IPNI SSA program partnered with Kenyatta University to hold a public seminar on pla ...


A highly successful farmer’s field day under the theme “GOOD WAYS TO FEED THE CROPS THAT FEED US” was held in Siaya County of Western Kenya on 8th November 2013. The field day was part of the activiti ...

Up scaling 4R Nutrient Stewardship in Western Kenya

The 4R Nutrient Stewardship project is partnering with the Siaya County Department of Agriculture (SCDA), Western Kenya to up scale 4R activities in Western Kenya.