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GRDC Final Reports

Reports from projects funded by the GRDC

Registered items

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The paper reports the subsequent impact of herbicides on seed production, a key factor affecting persistence of annual legume species... Seed yield was assessed by collecting all pods/burrs and free seed from the soil surface within one 0.2 m 2quadrat per plot using a vacuum harvester... Other factors to consider include (a) general adaptation of each species/line to the shallow duplex soil and 350mm rainfall zone as this will influence potential seed yield, and (b) secondary effects of herbicide use; for instance, a legume will generally benefit from reduced weed competition if it is tole...
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ABSTRACT A preliminary, mouse abundance model was constructed using artificial neural networks and data on trap success rates spanning a ten-year period in neighbouring catchments in Central Queensland... To predict trap success (percentage of traps that catch mice) in June, the model uses trap success rates in December and February, as well as rainfall in January/February and March/April... The preliminary results shown suggest that artificial neural networks have potential to be used to predict the likelihood of high mouse abundance in winter in Central Queensland...
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Kukri Aprovided a useful level of resistance to crown rot and raised soil inoculum levels of crown rot less than Frame .A Canopy management treatments were inconclusive but were promising enough to be pursued in 2005... Soil sampling methods for assessing crown rot inoculum levels in the soil and the risk categories associated with those inoculum levels need to be reviewed for Eyre Peninsula (EP) and other low rainfall, light soil regions... More research is needed to explore the relative contribution of varietal resistance levels and of plant material produced to this effect of varieties ...
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For weeds such as ryegrass, wild oats, and wild radish, this weed seed can be herbicide resistant and it is possible for growers to unwittingly introduce resistance to crop fields... In 2006 a field experiment was established to evaluate the evolution of resistance to diclofop-methyl... Clethodim is widely used to control otherwise resistant ryegrass clethodim resistance is increasing in ryegrass populations (Owen et al. 2007)...
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Stubble burning reduced soil carbon (C) stocks, partly through increased susceptibility to erosion... Grain head counts in September 2009 indicated significantly greater yield potential under stubble retention and zero-till compared with other treatments (Fetherstonhaugh site)... Grain yields under stubble retention and zero-till were slightly higher than in the other treatments (Fetherstonhaugh site)...
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Genetic diversity in Australian canola and implications for crop breeding for changing future environments... Field Crops Research 104:103- 111... Variation in fatty acid composition among genetically homogeneous seeds of canola (Brassica napus), and implications for genotypic selection based on single seeds...
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Experimental data are presented that show that fallow management, in particular that of weeds and residue cover, not only affects the amount of water stored or lost during the summer, but also has an effect on the loss of water past the root zone during the subsequent growing season... Model simulations capture these effects and a scenario analysis indicates that retaining residues past sowing increases the risk of deep water loss relatively rapidly... The effects of different residue management will be greater in wetter summers...
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Lines with high levels of resistance to these pathogens have been used by the Improvement Program to generate germplasm with multiple disease resistance... The arrows represent the anticipated improvement in combined resistance which can be expected in varieties that will be released in the future... During the course of project DAQ 00108 we have maintained a watching brief on diseases of pulses and sunflowers in the northern region through regular crop surveys, and intelligence from samples submitted for diagnosis and our network of growers, advisers and industry...
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Brown manuring benefits wheat in dry seasons.. Alternative management options for controlling ryegrass while sustaining profitable cropping are being compared in an eight-year project in Western Australia... The study also highlighted there was no advantage in uisng cultivation to stimulate the seedbank as a way to control ryegrass...
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The project has provided new information on noodle colour and colour stability and in particular germplasm and screening technologies required by wheat breeders to significantly reduce polyphenol oxidase (PPO), a significant component of noodle darkening... Substantial progress has been made towards optimising levels or activities of some components, e.g. PPO, xanthophyll and lipoxygenase, whilst further research is required to realise potential improvements in other components... The procedure is technically demanding but will provide an accurate measure of apigenin content that is requir...
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