Publication Date
1993
Description
A reduction in Aslrebla spp., and an increase in less palatable and less desirable forbs (Malvastmm americanum Psoralea cinerea), was identified as a problem in some paddocks of the Astrebla grazing lands of central western Queensland's clay soils. To determine possible rehabilitation for these pastures and assist the recovery of Astrebla spp,, a 2-year experiment was conducted near Muttaburra, Queensland (460 mm average annual rainfall), Six main treatments (nil, tine ripping, herbicide, slashing, fire, and a pioneering grass) were combined in a 6x2x2 split piot structure with grazed/not grazed and with additional Astrebla lappacea seed sown/not sown. Interim results showed that climate had a greater effect on the pasture than did the treatments. Stocking pressure was shown to be a powerful pasture manipulating option at the landholder's disposal especially when considering ease of application, Tine cultivation was detrimental to Astrebla pastures. Atrazine significantly increased grass yield, with future implications for strategic grass seed production during moderate to high winter rainfalUlow summer rainfall years.
Citation
Bushell, J J.; Reynolds, J A.; Cowan, D C.; Phelps, D G.; and Milson, J A., "Effect of Manipulative Management Options on a Degraded Pasture within the Astrebla spp. Grazing Lands of Western Queensland" (2024). IGC Proceedings (1993-2023). 16.
https://uknowledge.uky.edu/igc/1993/session11/16
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effect of Manipulative Management Options on a Degraded Pasture within the Astrebla spp. Grazing Lands of Western Queensland
A reduction in Aslrebla spp., and an increase in less palatable and less desirable forbs (Malvastmm americanum Psoralea cinerea), was identified as a problem in some paddocks of the Astrebla grazing lands of central western Queensland's clay soils. To determine possible rehabilitation for these pastures and assist the recovery of Astrebla spp,, a 2-year experiment was conducted near Muttaburra, Queensland (460 mm average annual rainfall), Six main treatments (nil, tine ripping, herbicide, slashing, fire, and a pioneering grass) were combined in a 6x2x2 split piot structure with grazed/not grazed and with additional Astrebla lappacea seed sown/not sown. Interim results showed that climate had a greater effect on the pasture than did the treatments. Stocking pressure was shown to be a powerful pasture manipulating option at the landholder's disposal especially when considering ease of application, Tine cultivation was detrimental to Astrebla pastures. Atrazine significantly increased grass yield, with future implications for strategic grass seed production during moderate to high winter rainfalUlow summer rainfall years.
