Improving Soil Fertility through Fertilizer Management in Sub-Saharan Africa

Andre Bationo, Upendra Singh, Ekwe Dossa, John Wendt, Sampson Agiyin-Birikorang, Franqois Lompo, and Prem Bindraban

CONTENTS

  • 4.1 Introduction............................................................................................................................67
  • 4.2 Changes in Paradigms for Soil Fertility Management in Sub-Saharan Africa......................71
  • 4.3 Productivity of African Soils..................................................................................................72
  • 4.4 Overview of Fertilizer Management.......................................................................................77
  • 4.4.1 Sources and Management of Nitrogen and Phosphorus Fertilizers...........................79
  • 4.4.2 Maintenance of Soil Organic Matter Plays a Key Role in Fertilizers’ Use

Efficiency and Recovery.............................................................................................81

4.4.3 Increasing the Legume Component in the Cropping System Can Affect the

Efficiency of Mineral Fertilizers................................................................................81

  • 4.4.4 Urea Deep Placement Increases Rice Productivity and Nitrogen Use Efficiency......82
  • 4.4.5 Strategic Application of Fertilizer: The Microdose Technology................................85
  • 4.4.6 Crop Residue and Manure Management....................................................................87
  • 4.4.7 Managing Other Nutrients Such as Secondary Nutrients and Micronutrients...........88
  • 4.4.8 Water and Nutrient Use Efficiency.............................................................................88
  • 4.4.9 Lessons Learned from Long-Term Experiments........................................................92
  • 4.5 The Way Forward...................................................................................................................93
  • 4.5.1 Tailoring Fertilizer Use for Mitigation and Adaptation to Climate Change..............93
  • 4.5.2 The Role of Crop Models...........................................................................................93
  • 4.5.3 The Need to Upscale IFDC’s New Approach to Develop, Manufacture, and

Deliver Balanced Fertilizers to Farmers: The SMaRT Approach..............................94

4.5.4 Multiple Functions from Innovative Fertilizer Products and Sector Transformation........95

References........................................................................................................................................96

 
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