East Africa Tradeoff Analysis Workshop Bio-physical working group
Workshop Program Program Monday Introduction to TOA approach Tuesday AM Conceptual framework Tuesday PM Introduction to TOA software Wednesday/ Thursday AM Disciplinary breakout groups Thursday PM TOA applications to Machakos system Friday Collaborating team work plans & presentations
Objectives 1.Get acquainted with the bio-physical datasets. 2.Learn how to set up data for the TOA model. 3.Backgrounds on Nutmon and DSSAT simulations. 4.Relevance of spatial variability. 5.Discuss the new advances to deal with data limitations and soil dynamics 6.Understand the process to run advanced scenarios.
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
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
Conceptual framework
Basic GIS data for Machakos
See c:\to31_mk\arcview\machakos.apr
Data acquisition Digital soil mapping Climate interpolation Model callibration
Traditional soil survey Scale Number of observations ,500 10,000 62, ,000
Parent material Topography Tillage erosion Land management Climate Causes of soil variability
Cause 1: Parent material
R2R2 Results
Cause 2: topography
R2R2 Results
Cause 3: Soil variability
Tillage erosion = f(distance, topography) No tillage erosion Strong tillage erosion Cause 3: Soil variability
R2R2 Results
Cause 4: Land management
R2R2 Results
Cause 5: Climate
R2R2 Results
Results: detailed soil survey
Climate interpolation