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East Africa Tradeoff Analysis Workshop

East Africa Tradeoff Analysis Workshop. Bio-physical working group. Workshop Program. Objectives. Get acquainted with the bio-physical datasets. Learn how to set up data for the TOA model. Backgrounds on Nutmon and DSSAT simulations. Relevance of spatial variability.

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East Africa Tradeoff Analysis Workshop

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  1. East Africa Tradeoff Analysis Workshop Bio-physical working group

  2. Workshop Program

  3. Objectives • Get acquainted with the bio-physical datasets. • Learn how to set up data for the TOA model. • Backgrounds on Nutmon and DSSAT simulations. • Relevance of spatial variability. • Discuss the new advances to deal with data limitations and soil dynamics • Understand the process to run advanced scenarios.

  4. Today’s program 8:30-9:00 General introduction 9:00-10:00 The NUTMON toolbox 10:00-10:30 Coffee 10:30-11:00 DSSAT 11:00-12:15 Discussion questions 12:30-13:30 Lunch 13:30-14:30 NUTMON exercises 14:30-15:00 DSSAT and inherent productivities 15:00-15:30 Coffee 15:30-17:00 Analysis of variance

  5. Tomorrow’s program 8:30-9:00 General introduction 9:00-10:30 Climate change scenarios 10:30-11:00 Coffee 10:30-12:00 Drought resistant maize varieties 12:00-12:30 Discussion

  6. Conceptual framework

  7. Conceptual framework

  8. Basic GIS data for Machakos

  9. Basic GIS data for Machakos See c:\to31_mk\arcview\machakos.apr

  10. Data acquisition • Digital soil mapping • Climate interpolation • Model callibration

  11. Traditional soil survey 250,000 Number of observations 62,500 10,000 2,500 100 625 Scale

  12. Causes of soil variability • Parent material • Topography • Tillage erosion • Land management • Climate

  13. Cause 1: Parent material

  14. Results R2

  15. Cause 2: topography

  16. Results R2

  17. Cause 3: Soil variability

  18. Cause 3: Soil variability

  19. Cause 3: Soil variability Tillage erosion = f(distance, topography) Strong tillage erosion No tillage erosion

  20. Results R2

  21. Cause 4: Land management

  22. Cause 4: Land management

  23. Results R2

  24. Cause 5: Climate

  25. Results R2

  26. Results: detailed soil survey

  27. Climate interpolation

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