Improving fertilizer recommendations for increased return from fertilizer investments and optimized crop response to fertilizer has been a major area of investigation of IFDC. Since 2008, IFDC through its Natural Resource Management (NRM) Program has partnered with national agricultural research services to undertake research, development and extensive on-farm trials in various agroecosystems in West Africa to develop site specific fertilizer recommendations for crops. Validation trials have been conducted in many countries (Benin (maize, cassava), Burkina (rice, maize and sorghum) Ghana (maize, cocoa and cassava) and Togo (maize and cassava). However, these fertilizer recommendation data remain scattered and most of them need final statistical analysis before they can be fully utilized and/or scaled out. As part of its efforts to improve fertilizer use and efficiency in West Africa, and following the recent adoption of the West African fertilizer recommendation action plan (RAP) by ECOWAS, IFDC has taken technical lead with key partner institutions and experts to build on previous and current fertilizer recommendations for various crops and countries in West Africa for wider uptake by public policy makers and fertilizer industry actors.

Preface.- 1. Combining the DSSAT Model and the Experiment to Update the Recommendations of Doses of Fertilizer for the Cultivation of Rice and Maize in Burkina Faso.- 2. Participatory Evaluation of Productivity, Fertility Management, and Dissemination of Irrigated Exotic Vegetables in the Sahel, West Africa.- 3. Recommendation of a New Dose of Fertilizer on Rice in the Irrigated Perimeters of the Niger River Valley.- 4. The Interactive Effect of Residue Quality, Quantity, Soil Texture and N Management on Maize Crop Yield in Ghana.- 5. Efficient Use of Water and Nutrients For Better Maize Productivity in Smallholder Farming System of Northern.- 6. Determination of Soil Nutrient Capacity for Updating Fertilizer Recommendations Under Soil and Water Conservation Techniques in the Zondoma Watershed of Burkina Faso.- 7. An Assessment of Inherent Chemical Properties of Soils for Balanced Fertilizer Recommendations for Cocoa in Ghana.- 8. Decision Support System for Site-specific FertilizerRecommendations in Cassava Production Systems in Southern Togo.- 9. Effects of Fractionation of Mineral Fertilizer Inputs on the Growth and Productivity of Three Varieties of Tomato (Lycopersicon esculentum Mill.) in Wintering Crops.- 10. Fertilizer Recommendation for Maize and Cassava within the Breadbasket Zone of Ghana.- 11. Combined Effects of Organic and Mineral Fertilizers on the Productivity of Tomato Soils: Experimentation on the Soil of the Yantala Low Ridge.- 12. Maize Response To Fertilizer On Ferralsol and Luvisol In the South Sudan Zone of Burkina Faso.- 13. Fertilizer Recommendations for Maize Production in the South Sudan and Sudano-Guinean Zones of Benin.- 14. Sorghum Grain Yield Under Different Rates of Mineral and Organic Fertilizer Application in the South-Sudan Zone of Burkina Faso.- 15. Promoting climate-smart agriculture through water and nutrient interactions optionsin semi-arid West Africa: a review of evidence and empirical analysis.- 16. Role of Decision Support Tools in site-specific fertilizer recommendations and Agricultural Planning in Sub-Sahara Africa.