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Catalogue: GRDC Factsheets
Of SurfACe TemPerATure SPrAy OPerATiOnS in cooling night conditions airborne pesticides can concentrate near the surface and unpredictable winds can move droplets away from the target... During surface temperature inversions, air near the ground lacks turbulence... SOurCe GrAeme TePPer under a surface temperature inversion: air movement is much less turbulent so the air does not mix in the same way as during the day; airborne droplets can remain concentrated in the inversion layer for long periods of time; the direction and distance pesticides movement is very hard to predict; the movement of airborne droplets will vary depending on the landscape; and droplets or their remnants can move in different ways (figure 3)...
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Catalogue: GRDC Factsheets
Of SurfACe TemPerATure SPrAy OPerATiOnS in cooling night conditions airborne pesticides can concentrate near the surface and unpredictable winds can move droplets away from the target... During surface temperature inversions, air near the ground lacks turbulence... SOurCe GrAeme TePPer under a surface temperature inversion: air movement is much less turbulent so the air does not mix in the same way as during the day; airborne droplets can remain concentrated in the inversion layer for long periods of time; the direction and distance pesticides movement is very hard to predict; the movement of airborne droplets will vary depending on the landscape; and droplets or their remnants can move in different ways (figure 3)...
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Catalogue: GRDC Factsheets
Of SurfACe TemPerATure SPrAy OPerATiOnS in cooling night conditions airborne pesticides can concentrate near the surface and unpredictable winds can move droplets away from the target... During surface temperature inversions, air near the ground lacks turbulence... SOurCe GrAeme TePPer under a surface temperature inversion: air movement is much less turbulent so the air does not mix in the same way as during the day; airborne droplets can remain concentrated in the inversion layer for long periods of time; the direction and distance pesticides movement is very hard to predict; the movement of airborne droplets will vary depending on the landscape; and droplets or their remnants can move in different ways (figure 3)...
Related categories:
Catalogue: GRDC Factsheets
Of SurfACe TemPerATure SPrAy OPerATiOnS in cooling night conditions airborne pesticides can concentrate near the surface and unpredictable winds can move droplets away from the target... During surface temperature inversions, air near the ground lacks turbulence... SOurCe GrAeme TePPer under a surface temperature inversion: air movement is much less turbulent so the air does not mix in the same way as during the day; airborne droplets can remain concentrated in the inversion layer for long periods of time; the direction and distance pesticides movement is very hard to predict; the movement of airborne droplets will vary depending on the landscape; and droplets or their remnants can move in different ways (figure 3)...
Related categories:
Catalogue: GRDC Factsheets
Of SurfACe TemPerATure SPrAy OPerATiOnS in cooling night conditions airborne pesticides can concentrate near the surface and unpredictable winds can move droplets away from the target... During surface temperature inversions, air near the ground lacks turbulence... SOurCe GrAeme TePPer under a surface temperature inversion: air movement is much less turbulent so the air does not mix in the same way as during the day; airborne droplets can remain concentrated in the inversion layer for long periods of time; the direction and distance pesticides movement is very hard to predict; the movement of airborne droplets will vary depending on the landscape; and droplets or their remnants can move in different ways (figure 3)...
Related categories:
Catalogue: GRDC Factsheets
Of SurfACe TemPerATure SPrAy OPerATiOnS in cooling night conditions airborne pesticides can concentrate near the surface and unpredictable winds can move droplets away from the target... During surface temperature inversions, air near the ground lacks turbulence... SOurCe GrAeme TePPer under a surface temperature inversion: air movement is much less turbulent so the air does not mix in the same way as during the day; airborne droplets can remain concentrated in the inversion layer for long periods of time; the direction and distance pesticides movement is very hard to predict; the movement of airborne droplets will vary depending on the landscape; and droplets or their remnants can move in different ways (figure 3)...
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Catalogue: GRDC Updates
Spraying when inversions exist and recent changes in operating practices are likely the cause of observed changes in patterns of damage witnessed in recent times... Uniform spray drift over large areas points to multiple spray applications injecting small droplets into the air which drift as one when inversions exist... The following illustration highlights possible wind flow and transport/deposition of airborne pesticides while inversions exist...
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Catalogue: GRDC Media
To minimise losses, a number of growers - many of whom have been practicing no-till or zero-till farming for 20 years - have been out cultivating to bring up clay clods and minimise topsoil losses... Primary Industries and Regions SA (PIRSA) soil and land management consultant David Woodard says growers who have undertaken "emergency tillage" have been cultivating just deep enough to bring up clods of clay to cover the furrow... Mr Woodard says there are certain types of clay to avoid if growers choose to practice clay spreading or delving on sandy soils to stop erosion...
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Catalogue: GRDC Media
To minimise losses, a number of growers - many of whom have been practicing no-till or zero-till farming for 20 years - have been out cultivating to bring up clay clods and minimise topsoil losses... Primary Industries and Regions SA (PIRSA) soil and land management consultant David Woodard says growers who have undertaken "emergency tillage" have been cultivating just deep enough to bring up clods of clay to cover the furrow... Mr Woodard says there are certain types of clay to avoid if growers choose to practice clay spreading or delving on sandy soils to stop erosion...
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Catalogue: Nuffield Scholar Reports
The benefits offered to agriculture with the renewable energy in Australia... The unit is estimated to produce around 210,000 KWh of electricity per year and with no anticipated environmental effects as this type of generator is claimed to be "fish friendly" allowing for migration of fish both up and down the Archimedes screw action... " The easiest way to show this is by the following simple graph that demonstrates that this increase in wind speed creates an exponential increase in energy...
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