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Ibrahim Wanyama CLIFF Workshop
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Ibrahim Wanyama CLIFF Workshop


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PhD research presentation at the workshop of the Climate Food and Farming Network, Dec. 2-4 at Aarhus University, Foulum. The Climate Food and Farming Network is an initiative of Copenhagen U., Aarhus …

PhD research presentation at the workshop of the Climate Food and Farming Network, Dec. 2-4 at Aarhus University, Foulum. The Climate Food and Farming Network is an initiative of Copenhagen U., Aarhus U., and the CGIAR Research Program on Climate Change, Agriculture and Food Security.

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  • 1. Assessing mitigation options to reduce greenhouse gas emissions from agriculture at farm and landscape level in the CCAFS Rakai block - Uganda 1. 2. 3. Wanyama Ibrahim Prof. Dr. Klaus Butterbach-Bahl Dr. Rufino Mariana Dr. Piet Van Asten CLIFF Network Workshop, Foulum
  • 2. Background      Agriculture is affected by climate change However Agricultural activities and LUC are responsible for GHG emissions (30%) Greatest emissions originate from low and middle income countries (74%) Predominantly small holder based Increasing population, more emission CLIFF Network Workshop, Foulum
  • 3. Cont.      Therefore agriculture has potential to reduce GHG Need to understand Agricultural systems No studies on emissions (Kim, 2011) Africa Site specific data needed for mitigation options Soil emissions are driven by environmental factors CLIFF Network Workshop, Foulum
  • 4. Objectives Main Objective  Specific objectives/ Expectations Identify mitigation options with respect to GHG emissions    To quantify SOC, N and GHG exchanges in the dominant agricultural and natural systems To evaluate the potential of GHG fluxes from identified land-use typesHotspots To evaluate the impact of land-use on GHG fluxes CLIFF Network Workshop, Foulum
  • 5. Specific objectives  Run simulations of effect of different management practices on GHG and yields- Landscape DNDC model CLIFF Network Workshop, Foulum
  • 6. Study Area     Rakai Site 10X10 km CCAFS site Bimodal Rainfall pattern (1200mm) Undulating topography Small-holder farmers dominated Diversified farming practices and landscape CLIFF Network Workshop, Foulum
  • 7. Approach Farm characterization data (IMPACTLITE) Land Use, Field type Analysis and soil types Aerial Photos, satellite images, topographic sheets, soil 1. Core samples 2. Soil sample 1. Potential GHG 2. SOC stocks Field GHG measurements GHG inventory Land use, field types and inventory CLIFF Network Workshop, Foulum Model Parametersation validation Testing Simulations at plot and landscape scale
  • 8. Clusters  •  3 dominant soil types Profile description  Topo-sequence description- DEM CLIFF Network Workshop, Foulum
  • 9. Land-use change 1954 2012 CLIFF Network Workshop, Foulum
  • 10. Land-use changes at Landscape scale Land Use type Seasonal Wetland Permanent Wetland Natural Forest Eucalyptus Area in 1954 (Ha) Area in Area in 1988 (Ha) 2012 (Ha) 235 174.7 112 161 139 135 207 * 0 0 * 225 CLIFF Network Workshop, Foulum
  • 11. Total land size of subplots Area occupied by the land-use type 450 Total Area (Acres 400 350 300 250 200 150 subplot Area 100 50 0 Various intercrops
  • 12. Plot level- inputs Crop Total Mulched number of sub-plots sub-plots Fertilized sub-plots Manured Minimum sub-plots Tillage (Herbicide) Banana Coffee 337 271 76 6 1 3 29 12 30 31 Tomatoes Maize Beans 32 456 389 20 1 3 5 5 1 11 6 1 5 26 12 CLIFF Network Workshop, Foulum
  • 13. Land use types          Permanent wetlands Seasonal wetlands Eucalyptus forests in wetland Eucalyptus in Other slope positions Wetland converted to Arable land Perennial systems Annual systems Grazing land Natural Forests CLIFF Network Workshop, Foulum
  • 14.   Flux measurement Manual static chamber method Fluxes rates Gas chromatography (ECD and FID- detectors) CLIFF Network Workshop, Foulum
  • 15. THANK YOU     ILRI SAMPLES project IITA CLIFF Network CLIFF Network Workshop, Foulum