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A farm level assessment of a novel drought tolerant forage:Tedera (Bituminaria bituminosa C.H.Stirt var. albomarginata). AgEcon
Finlayson, John D.; Real, Daniel; Nordblom, Thomas L.; Revell, Clinton; Ewing, Michael A.; Kingwell, Ross S..
Tedera (Bituminaria bituminosa C.H.Stirt var. albomarginata) is a drought tolerant perennial legume originating in the Canary Islands. This study evaluates the potential role and value of tedera in dryland mixed crop and sheep production systems in southern Australia. Regional variants of the bio-economic model MIDAS are used to assess tedera in farming systems at two locations. The analysis considers the quantity and quality of feed produced by tedera, the ability of other forages to complement or substitute for tedera and its impact on meat versus wool-producing sheep flocks. The results indicate that tedera offers the potential to increase farm profits by up to 26% and be grown on ~28% of a low rainfall mixed enterprise farm. On a high rainfall mixed...
Tipo: Presentation Palavras-chave: Tedera; Drought tolerant; Forage; Legume; Mediterranean-type climate; Autumn feed gap; Bio-economic modelling; Whole farm modelling; Technology evaluation; MIDAS; Model of dryland agricultural system.; Crop Production/Industries.
Ano: 2012 URL: http://purl.umn.edu/124297
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Bio-economic evaluation of pasture-cropping, a novel system of integrating perennial pastures and crops on crop-livestock farms AgEcon
Finlayson, John D.; Lawes, Roger A.; Metcalf, Tess; Robertson, Michael J.; Ewing, Michael A..
Pasture-cropping is a novel approach to increase the area of perennial crops in mixed sheep and cropping systems. It involves planting annual cereals directly into a living perennial pasture. There is interest in subtropical grasses as they are winter dormant and their growth profile is potentially well suited to pasture-cropping. However, a wide range of factors can affect the uptake of such systems. This paper assesses the relative importance of factors that can influence decisions to introduce pasture-cropping. In this paper the research question is: what factors predispose a farm to take up a new technology such as (1) subtropical grass and (2) subtropical grass that is pasture-cropped. The analysis uses the MIDAS model of a central wheatbelt farm in...
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/59074
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Developing Environmental Service Policy for Salinity and Water: Experiments with Regulations and Markets Linking Watersheds with Downstream Water Users AgEcon
Nordblom, Thomas L.; Reeson, Andrew; Whitten, Stuart M.; Finlayson, John D.; Kelly, Jason A.; Hume, Iain H..
Shortfalls in water supplies are perhaps the greatest practical NRM policy concern in Australia today, looming larger in many minds than the great international debates on greenhouse gasses, climate change and biodiversity. Because forest land cover uses more water than any other, wide expansion of upstream tree plantations can significantly reduce water yields upon which downstream urban, agricultural and wetlands depend. We consider the economic efficiency and equity (profitability and distributional) consequences of upstream land use change. The ‘environmental services’ of concern in our study are the mean annual quantities and qualities (volumes and salt concentrations) of water flowing from upper parts of a catchment to the downstream interests...
Tipo: Conference Paper or Presentation Palavras-chave: Experimental economics; Land use; Rival water uses; MBI; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/6249
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Disposition of precipitation: Supply and Demand for Water Use by New Tree Plantations AgEcon
Nordblom, Thomas L.; Finlayson, John D.; Hume, Iain H..
As the greatest rainwater users among all vegetative land covers, tree plantations have been employed strategically to mitigate salinity and water-logging problems. However, large-scale commercial tree plantations in high rainfall areas reduce fresh water inflows to river systems supporting downstream communities, agricultural industries and wetland environmental assets. A bio-economic model was used to estimate economic demand for water by future upstream plantations in a sub-catchment (the 2.8 million ha Macquarie valley in NSW) of the Murray-Darling Basin, Australia. Given four tree-product values, impacts were simulated under two settings: without and with the requirement that permanent water entitlements be purchased from downstream entitlement...
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy; Forest; Environmental services; Catchment; Water sources; Interception; Entitlement; Supply; Demand; Market; Economic surplus; Evapo-transpiration; Urban water; Irrigation; Wetlands..
Ano: 2011 URL: http://purl.umn.edu/101225
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Downstream benefits vs upstream costs of land use change for water-yield and salt-load targets in the Macquarie Catchment, NSW AgEcon
Nordblom, Thomas L.; Hume, Iain H.; Finlayson, John D.; Kelly, Jason A.; Welsh, Rob; Hean, Robyn L..
The net present value (NPV) of downstream economic benefits of changes in water-yield (W) and salt-load (S) of mean annual river flow received by a lower catchment from an upper catchment are described as a 3-dimensional (NPV,W, S) surface, where dNPV/dW > 0 and dNPV/d(S/W) < 0. Upstream changes in land use (i.e. forest clearing or forest establishment, which result in higher or lower water-yields, respectively) are driven by economic consequences for land owners. This paper defines conditions under which costs of strategic upstream land use changes could be exceeded by compensations afforded by downstream benefits from altered water-yields and/or lower salt loads. The paper presents methods, and preliminary calculations for an example river,...
Tipo: Conference Paper or Presentation Palavras-chave: Policy markets upstream downstream water; Salinity Land Economics/Use.
Ano: 2007 URL: http://purl.umn.edu/10355
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Experiments with regulations & markets linking upstream tree plantations with downstream water users AgEcon
Nordblom, Thomas L.; Reeson, Andrew; Finlayson, John D.; Hume, Iain H.; Whitten, Stuart M.; Kelly, Jason A..
Land-use change in upper catchments impact downstream water flows. As trees use large amounts of water the expansion of upstream plantations can substantially reduce water availability to downstream users. There can also be impacts on downstream salinity due to reduced dilution flows. In some jurisdictions afforestation requires the purchase of water rights from downstream holders, while in others it does not, effectively handing the water rights to the upstream landholders. We consider the economic efficiency and equity (profitability and distributional) consequences of upstream land use change in the presence of a water market under alternate property rights regimes and different salinity scenarios.
Tipo: Conference Paper or Presentation Palavras-chave: Experimental-economics; Tree-plantations; Environmental-services; Urban; Irrigation; Stock & domestic; Water use; Land use.
Ano: 2009 URL: http://purl.umn.edu/47945
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Farm and catchment scale effects of managing dry-land salinity with pastoral and woody perennials AgEcon
Finlayson, John D.; Bathgate, Andrew D.; Hoque, Ziaul; Nordblom, Thomas L.; Theiveyanathan, Tivi; Crosbie, Russell; Mitchell, David.
Dry land salinisation is a significant cause of land and water degradation in Australia. Changing land use from annual to perennial crops has been widely proposed as a means to reduce land degradation and increase the productivity of saline land. However, in many areas annual crops are financially more attractive than perennial crops. Increases in perennial crops might also reduce local stream flows with adverse effects on in-stream values. As such salinity control is likely to involve significant tradeoffs between public and private costs and benefits. This paper considers the impact of planting differing areas of pastoral and woody perennials on farm profitability (P), and water (W) and salt (S) exports from the Little River catchment in New South Wales...
Tipo: Conference Paper or Presentation Palavras-chave: Bio-economic modelling; Linear programming; Farm systems; Catchments; Dryland salinity; Land Economics/Use.
Ano: 2007 URL: http://purl.umn.edu/10409
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Minimising costs of environmental service provision: water-yield, salt-load and biodiversity targets with new tree planting in Simmons Creek Catchment, NSW, a dryland farming/grazing area. AgEcon
Nordblom, Thomas L.; Hume, Iain H.; Cresswell, Hamish; Glover, Mark; Hean, Robyn L.; Finlayson, John D.; Wang, Enli.
Although dryland farming and grazing have been practiced for over 130 years in the 17,000 ha Simmons Creek catchment without surface salinity problems, the area has been identified as a significant source of salt seepage to Billabong Creek in the NSW Murray catchment. Groundwater movement and salinity levels are spatially heterogenous at Simmons Creek. Groundwater of the upper catchment is relatively fresh and seemingly unconnected with the highly saline groundwater of the lower catchment. However, fresh surface water does flow from the upper to the lower catchment. This spatial diversity provokes the question of where high-water-use forest habitats might be placed to achieve different combinations of environmental services (greater water yield, lower...
Tipo: Conference Paper or Presentation Palavras-chave: Optimisation; Opportunity costs; Forest-habitat; Environmental services; Environmental Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/10357
Registros recuperados: 8
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