Abstract
Climate is a major source of risk in rainfed farming systems. Systems thinking from natural sciences is used to define and explore concepts of weather, climate and climate change before discussion of how climate data can be used in simulation models of agricultural production systems. We then use systems engineering to consider the nature of climate risk and the use of seasonal climate forecasts in managing risk in rainfed cropping decisions in case studies from Australia and the Philippines. Finally, we consider some of the human factors in managing climate risk using soft systems methodology.
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Notes
- 1.
See Glossary.
- 2.
See Glossary for explanation.
- 3.
See Glossary for definitions of Hard and Soft Systems methodology.
- 4.
See glossary for any unfamiliar terms.
- 5.
See Glossary.
- 6.
See Glossary.
- 7.
See Glossary for definitions of top down and bottom up approaches.
- 8.
See Glossary for description of various simulation models.
- 9.
See Glossary for explanation.
- 10.
Bayes’ theorem relates the conditional and marginal probabilities of two random events. It is often used to compute posterior probabilities, given observations.
- 11.
Deep drainage is important in this case as it may raise watertables and introduce salt into the root zone.
- 12.
See Glossary for explanation.
- 13.
Decision Support System for Agrotechnology Transfer Version 4.0 CERES-Maize (Crop Environment Resource Synthesis) model is a predictive, deterministic model designed to simulate corn growth, soil, water and temperature and soil nitrogen dynamics at a field scale for one growing season. The model is used for basic and applied research on the effects of climate (thermal regime, water stress) and management (fertiliser practices, irrigation) on the growth and yield of corn. It is also used to evaluate effects of nitrogen fertiliser practices on nitrogen uptake and nitrogen leaching from soil; and in global climate change research, to evaluate the potential effects of climate warming and changes in precipitation and water use efficiency due to increased atmospheric CO2.
- 14.
See US National weather service Climate Prediction Centre .http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/ensostuff/nino_regions.shtml.
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Acknowledgements
Crean and Predo’s time was funded by the ACIAR project ‘Bridging the Gap Between Seasonal Climate Forecasts and Decision Makers in Australia and The Philippines.’ Hayman’s time was funded by the same ACIAR project and a project with the Centre for Natural Resource Management. Dr Uday Nidumolu contributed useful discussion on soft and hard systems and the image for Fig. 3.3.
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Hayman, P., Crean, J., Predo, C. (2011). A Systems Approach to Climate Risk in Rainfed Farming Systems. In: Tow, P., Cooper, I., Partridge, I., Birch, C. (eds) Rainfed Farming Systems. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9132-2_3
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