Semelhante a Is there an ideal farming system to maximise stored soil water in the Eastern Australian, Vertosol dominated, semi-arid sub tropics? Jeremy Whish
Semelhante a Is there an ideal farming system to maximise stored soil water in the Eastern Australian, Vertosol dominated, semi-arid sub tropics? Jeremy Whish (20)
Measures of Central Tendency: Mean, Median and Mode
Is there an ideal farming system to maximise stored soil water in the Eastern Australian, Vertosol dominated, semi-arid sub tropics? Jeremy Whish
1. Is there an ideal farming system to maximise
stored soil water in the Eastern Australian,
Vertosol dominated, semi arid sub tropics?
Jeremy Whish
2. Key Messages
• Complex systems analysis does not need to be done with
a single complex model
• Reducing complex systems to simple messages is useful
• A single picture can capture the learning of 1000
simulations
• Risk and Variability should be managed at both the farm
and paddock(field) levels
CSIRO. Using models to support farmer decision-making
3. Background
Brisbane
Walgett
Sydney
CSIRO. Using models to support farmer decision-making
5. The Initial Problem
• Could APSIM be used to identify if our current
farming system is matched to our
environment ?
CSIRO. Using models to support farmer decision-making
7. The starting point
• How much rainfall ?
• When does it fall ?
• How much do you need ?
• How variable is it ?
CSIRO. Using models to support farmer decision-making
18. Conclusion
• Was there an ideal crop rotation for the region that
maximised yield and minimised risk ?
• yes but flexible management is needed in a variable
environment
• Was simulation modelling the right approach ?
• yes but it needs to be combined with simple models.
CSIRO. Using models to support farmer decision-making