M. Okumu - Growing Africa

Tag: M. Okumu

August 5, 2026

Beyond the Rains: Financial Liquidity as a Determinant of 4R Nutrient Timing in Kenya

By Brayan Valencia, Ivan Adolwa, Martha Okumu, Joses Muthamia, Simon Cook, and Thomas Oberthür

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2025 Annual Photo Contest Results

We’re excited to announce the results of our annual photo contest! Thank you for the incredible submissions from across Africa. Your participation helps us showcase nutrient deficiency examples and plant nutrition research, raising awareness about healthy soils and crops, and sharing interesting activities and perspectives about agricultural R&D in Africa.

Agricultural Development in Maize and Rice: Yield-Area Dynamics, Agronomic Strategies, and 4R Nutrient Management Opportunities

Contributors: Simon Cook, Thomas Oberthür, Gavin Sulewski

Share your Snapshots (Vol 4 Issue 2)

On-farm innovation with farmers and NARS staff for Sustainable Nutrient Management, identifying nutrient deficiencies and demonstrating the importance of soil testing and yield response for site-specific fertilizer recommendations in Dibri-Assirikro, Department of Sakassou, Central Region of Cote d’Ivoire.

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