160-year systems experiment in Australia

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160-year systems experiment in Australia

  1. 1. 160-year systems experiment in Australia Kirkegaard and Hunt, 2010 Is this where we are in Sub Saharan Africa? Nationalaveragewheat Can we reach here?
  2. 2. Systems methodology 1.Control 2.Best-bet (whatever it takes) 2 treatments • NOT multi-factorial, statistical design – not possible! • Treatments are not individual interventions • The treatments are how/what is adopted, in what combinations and how decisions made • Follow trajectories • Africa RISING – Ethiopian Highlands adopting this design • Other reactions – hahahahaha!! Haha ha!
  3. 3. A Soil water management Business Skills Information and knowledge High soil carbon Degraded Current Greater PAWC Stock management Organic residue Deeper-rooted species Fallow Zero till Reduced tillage System improvement trajectory C B W I B Ellis (unpublished) WIB-space PAWC = Plant Available Water Capacity
  4. 4. + A Degraded/poor use of resources Current practice C B W I B Ellis (unpublished) WIB-space Irrigated Rain fed Ag. Wat. Man. Land use design High water productivity
  5. 5. 100 years (Australia) v 30 years? (West Africa?) v

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