Recycling Nutrients from Organic Wastes in Kenya’s Capital City

  • Mary Njenga
  • Dannie Romney
  • Nancy Karanja
  • Kuria Gathuru
  • Stephen Kimani
  • Sammy Carsan
  • Will Frost


The question how much of the potential soil nutrients contained in urban wastes are being used and what processes are involved led to this study in the early 2000s. The issue is of central importance to understanding the potential benefits of a properly managed urban agriculture sector, since soil fertility is a major problem in Sub-Saharan Africa and urban wastes represent a large potential source of nutrients (Savala et al. 2003). Mougeot (1993, p.114) highlighted the importance of solid waste management and offered insights into the use of organic wastes by farmers as compost for their crops. When the Consultative Group on International Agricultural Research (CGIAR) was starting up its new system-wide program – Urban Harvest – in Africa in late 2000, stakeholders called for better documentation of these processes. In response, we came together from a number of institutions in Kenya to identify and map out the basic market and material flows for composts and manure in Nairobi and identify opportunities for improving the functioning of the system.


Informal Settlement Urban Agriculture Cattle Manure Livestock Manure Livestock Keeper 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© International Potato Center (CIP) 2010

Authors and Affiliations

  • Mary Njenga
    • 1
  • Dannie Romney
    • 2
  • Nancy Karanja
    • 1
  • Kuria Gathuru
    • 3
  • Stephen Kimani
    • 4
  • Sammy Carsan
    • 5
    • 6
  • Will Frost
    • 7
  1. 1.Urban Harvest, c/o CIPNairobiKenya
  2. 2.CABI AfricaNairobiKenya
  3. 3.Kenya Green Towns Partnership AssociationNairobiKenya
  4. 4.Kilimo Trust FoundationKampalaUganda
  5. 5.World Agroforestry Center, (ICRAF)NairobiKenya
  6. 6.University of the Free StateBloemfonteinSouth Africa
  7. 7.formally with the World Agroforestry CenterNairobiKenya

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