A farm-level analysis for carbon sequestration in Ghana using IMPACT linked with the DSSAT , Household and Ruminant models E. González-Estrada 1 , V.K. Walen 2 , J. Naab 3 , P.K. Thornton 1 and M. Herrero 1 1 International Livestock Research Institute , PO Box 30709, Nairobi, Kenya 2 University of Florida , PO Box 110570, Gainesville, FL, USA 3 Savanna Agricultural Research Institute , PO Box 494, Wa, Upper West Region, Ghana

Case study: CRSP-SM field trials in Wa, Upper West region of Ghana Objective: Explore the role of crop-livestock interactions in the carbon dynamics at the farm level

IMPACT I ntegrated M odelling P latform for Mixed A nimal- C rop Sys t ems Framework Household Optimization Model Multiple-Criteria linear programming DSSAT Crops Ruminant Livestock

Case study Piisi, Upper West Region, Ghana Household size: 12 (5 adults & 7 children) Plot ID Size Crop 1 0.8 ha Groundnuts 2 1.6 ha Rice 3 1.2 ha Millet Cowpea Sorghum 4 0.3 ha Bambara nuts 5 0.6 ha Yams 6 0.4 ha Maize

Case study – 2- Livestock Number Cattle 2 Sheep 3 Goats 2 Pigs 3 Chicken 15 Guinea fowl 8

IMPACT’s base line scenario analysis: Net income : 160 USD Total carbon balance in agricultural land (Inputs-Outputs) : -3219 kg Food security status : Low energy and protein intake during June-October

IMPACT Integrated Modelling Platform for Mixed Animal-Crop Systems Household Optimization Model Multiple-Criteria linear programming Framework DSSAT Crops Ruminant Livestock

Rainfall distribution in Wa, and its effect on fodder resources utilization Homestead native fodder Maize stover

Trade-off analysis by simulated output of number of TLU vs grain yield Grain yield Number of TLU

Conclusion Is the household of this case study ready for adopting technologies to improve carbon sequestration? Household level analyses for priority setting Produce a household typology for a given ecoregion Identify farm types that are capable to modify management strategies towards a better use of carbon

La fin Merci!