Agricultural adaptation during times of change - Thilak MallawaarachchiPresentation Transcript
Agricultural adaptation during times of change Thilak Mallawaarachchi, David Adamson, John Quiggin and Peggy Schrobback Risk and Sustainable Management Group, The University of Queensland, Brisbane 4067Paper presented to the CCRSPI Conference 2011, The National Climate Change Research Strategy for Primary Industries, February 15-17 2011, Melbourne Cricket Ground (MCG).
Adaptation • Adaptation to climate change – finding ways to live with scarcer water, higher peak temperatures, higher sea levels and weather patterns at odds with those under which today’s settled patterns of farming developed The Economist, Nov 25, 2010Photo credit: Anthea McClintock, Jemalong, NSW, 151210
Agricultural Adaptation • Crop adaptation – sole basis of agriculture* – The relationships between the environmental factors and the growth response of plants – Matters of ecology, with elements of geography, physiology, genetics, meteorology, and agronomy • Climate risks include issues beyond farm – Linked through markets and trade, and social imperatives such as food security and poverty*Wilsie, CP & Shaw, RH 1954, Crop Adaptation and Climate, in AG Norman (ed.), Advances in Agronomy, Academic Press, vol. Volume6, pp. 199-252.
Climate risks• Increasing uncertainty – Affects the set of available options – And the nature of outcomes of decisions• Potential payoffs are dictated by knowledge and endowment Faced with the prospect of learning, increasing uncertainty leads to a preference for more flexible strategies Problem How to find the set of flexible and efficient strategies when the distribution of the states of nature is widening
History matters• Path dependence• Explanations for path dependence – increasing returns (size economies) – self-reinforcement (complementarity) – positive feedbacks (early-mover advantage) – lock-in (popular choices, capital fixity) ... and more ...
Real Value of Australian Agricultural Output by Commodity $60Billions Livestock $50 Cereal for grain $40 Milk Wool $30 Vegetables $20 Fruit and nuts Cotton $10 Other Grapes $0 Sugarcane Oilseeds
$16Billions $14 $12 $10 $8 Fruit and nuts $6 Cereal for grain $4 Livestock $2 $0
Broadacre Farm Performance over timeSheng et at 2011
Economies of size and technologySheng et at 2011
Issues for exploration• Path dependence of farmers’ technical choices for managing climate risk when farmers have difficulty in separating climate change from natural variability• Adopting sub-optimal decisions in the interim in adapting to change• Understanding the role of externalities in defining sub-optimality for society• Linking agroecological and institutional innovation for optimal decisions under uncertainty
Global effects 1 Global climate change 2 Sectoral effects National effects 3 Economic growth Population Technology Governance Strategic planningAgricultural systems
Schematic representation of methods used to combine crop and climate models.Challinor A J et al. J. Exp. Bot. 2009;60:2775-2789
Cross-scale interactions over time Regional/ Landscape Farming system Plot/paddockRepresent uncertainty as states of nature and their range of probabilities
Understanding the full pictureIt is argued that the Indian peasants in Chiapas, Mexico arebackward, they produce only two tons of maize per hectare asagainst six on modern Mexican plantations. But this is only partof the picture. The modern plantation produces six tonnes perhectare and that’s it. But the Indian grows a mixed crop.Amongst his corn stalks, that also serve as support for climbingbeans, he grows squash and pumpkins, sweetpotatoes, tomatoes and all sorts of vegetables, fruit andmedicinal herbs. From the same hectare he also feeds his cattleand chickens. He easily produces more than 15 tons of food perhectare and all without commercial fertilisers or pesticides andno assistance from banks or governments or transnationalcorporations.Jose A. Lutzenberger, former Minister of the Environment for Brazil. http://www.afgventuregroup.com/dispatches/afg-venture-group-newsletter/october-2010-primary-industries-with-a-focus-on-agriculture-and-agribusiness/
Decline of the Sheep Industry? Australian Sheep Numbers (Million)200180160 ACT140 Tas120 WA100 80 SA 60 QLD 40 VIC 20 NSW 0 1989 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009