Theme 6 Project 3.4
Structural Change in Australian Agriculture: Implications for Natural Resource Management
Part 2: Salinity Case Studies
Neil Barr
Natural Resources and Environment Victoria
Contents
Summary..................................................................................................................... 1
What is capacity to change?...................................................................................... 1
Wanilla: Living with salt ............................................................................................. 2 The catchment ..........................................................................................................................2 The farm community .................................................................................................................2 Salinity control...........................................................................................................................4 The live with salt option.............................................................................................................5 The salinity control option .........................................................................................................8 Conclusions ..............................................................................................................................9
Kamarooka: Capacity mediated by external factors .............................................. 10 The catchment ........................................................................................................................10 The farm community ...............................................................................................................10 Salinity control.........................................................................................................................12 The adoption of dryland lucerne .............................................................................................13 Social structure and sustainability ..........................................................................................16
Lake Warden: A reason to change .......................................................................... 17 The catchment ........................................................................................................................17 The farm community ...............................................................................................................17 Salinity control.........................................................................................................................19 A constrained capacity to change...........................................................................................21 Conclusion ..............................................................................................................................23
Upper Billabong Creek: The value of research....................................................... 24
Conclusions.............................................................................................................. 26
References ....................................................................... Error! Bookmark not defined.
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The live with salt option
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120
100
80
60
40
20
96
94
98 19
19
90
88
92
19
19
19
86
19
84
82
80
78
Salt Loss Index
19
19
19
19
76
Farm Terms of Trade
19
72
74
19
19
68
66
64
62
60
70
19
19
19
19
19
19
19
Ye
ar
0
Combined impact
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120 100 80 60 40 20
Ye ar 20 00 20 01 20 02 20 03 20 04 20 05 20 06 20 07 20 08 20 09 20 10 20 11 20 12 20 13 20 14 20 15 20 16 20 17 20 18 20 19
0
Long term terms of trade trend
Combined impact of terms of trade decline and salinity losses
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120 100
Index
80 60 40 20
19
18
20
17
20
16
20
15
20
14
20
13
20
12
20
11
20
10
20
09
20
08
20
07
20
06
20
05
20
04
20
03
20
02
20
01
20
20
r
20
Ye a
00
0
Projected farmer numbers (fast scenario) Projected farmer numbers (average projection) Projected farmer numbers (slow acenario) Mid range farmer number scenario and salinity scenario
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The salinity control option
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Conclusions
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Kamarooka: Capacity mediated by external factors The catchment
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No. of farmers
Pasture mix area (ha)
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100 1996
1997
1998
1999
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Median EVAO ($000’s)
400 350 300 250 200 150 100 50
Australia
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
0
Esperance
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Lake Warden Catchment Non agricultural land Esperance SLA
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5131604
Lake Warden Catchment Non agricultural land CCD 5131604
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Lake Warden Recovery Catchment
Coramup Creek
Bandy Creek Neridup Creek
MAP LEGEND
N
Esperance
DEPARTMENT OF CONSERVATION AND LAND MANAGEMENT
Kilometres
Esperance Western Lakes
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A constrained capacity to change
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Index of farmer population
120 100 80 60 40 20
20 18
20 16
20 14
20 12
20 10
20 08
20 06
20 04
20 02
20 00
0
Year No salt
No intervention
50% recharge control
75% recharge control
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Conclusion
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References
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