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2007 Conference (51st), February 13-16, 2007, Queenstown, New Zealand >
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http://purl.umn.edu/10409
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| Title: | Farm and catchment scale effects of managing dry-land salinity with pastoral and woody perennials |
| Authors: | Finlayson, John D.
Bathgate, Andrew
Hoque, Ziaul
Nordblom, Thomas L.
Theiveyanathan, Tivi
Crosbie, Russell
Mitchell, David |
| Keywords: | Bio-economic modelling
linear programming
farm systems
catchments
dryland salinity |
| Issue Date: | 2007 |
| Series/Report no.: | Conference Paper |
| Abstract: | 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 (NSW), Australia. The analysis uses two linear programming (LP)
models. The first model represents a mixed crop and sheep system and the outputs of
this model are integrated to provide inputs to a second catchment level model. The
structure of the LP models is described and an analysis of the potential for perennials
to assist in salinity management is presented. The implications of the analysis for
farm systems and catchment scale changes in land use are considered.
The study highlighted the importance of targeting management decisions to individual
sub-catchments and of using relatively detailed farm level models as part of a
catchment level study. The potential for perennials to contribute to profitable and
robust farm systems and to reduce degradation to land from salt scalds and to streams
arising with elevated discharge and wash-off of salt is demonstrated. |
| URI: | http://purl.umn.edu/10409 |
| Institution/Association: | Australian Agricultural and Resource Economics Society - 2007>2007 Conference (51st), February 13-16, 2007, Queenstown, New Zealand |
| Total Pages: | 30 |
| Language: | English |
| Collections: | 2007 Conference (51st), February 13-16, 2007, Queenstown, New Zealand
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| cp07fi01.pdf | 165Kb | PDF | View/Open |
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