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GRDC Updates

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Despite flowering earlier, mustard did not yield better than canola in 2011.. The results show the importance of early growth up to flower bud appearance to the yield potential of canola and mustard as this helps develop the sink capacity (i.e. pod number)... This study of different canola and mustard cultivars showed the improvement in yield with added nitrogen...
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At Dubbo, from June to November, 318 mm of rain fell on 52 days with 34 days >1.0mm, compared with a long-term average of 282 mm on 43 days (34 days >1.0mm)... Monitor the crops 2-3weeks after each rain event from emergence onwards and spray if Ascochyta is detected in the crop or is found in the district on any variety... (GMs also take into account other production costs estimated at $300/ha; chickpea price $450/t)..
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Every season grazing crops have provided a benefit to the whole farm bottom line, from the wetter years of the eighties and nineties when grazing wheat was the outstanding enterprise, through the dry years from 2002 to 2009, where grazing crops provided a crucial "fall back" position for winter dry matter production; reducing and often avoiding the otherwise required supplementary feeding... Again in 2010 with a return to more favorable conditions, grazing cereals and grazing canola performed extremely well, providing benefits right across the farm with a resulting increase in whole farm p...
Catalogue: 
My aim is not to provide a recipe for planting summer crops in north-western NSW, but to provide some insight and tools to assist in the decision making process... Table 1 shows that when planting between October and the 1 st of January, there is an 80% chance of receiving at least 110-120mm of in-crop rainfall this calculation does not consider the impact of rainfall timing on crop demand... Figure 3 supports the back of the envelope calculation suggesting the 150mm of starting water is the minimum required to achieve a 3t yield 5 years in 10 while if you have 200mm of stored water the pr...
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If we may accept that S removal in grain is lower than commonly accepted... S requirements of the trial yields could have been satisfied even considering an arbitrary figure of only 50% efficiency, except the Nyngan site... The figure of 50% above has no sound basis the author is aware of...
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The particular directive includes a requirement that treated drinking water should not have more than a total content of pesticides of 0.5 parts per billion (measured as milligrams/litre) and that an individual active substance should not exceed 0.1 parts per billion... The new lists contain pesticides whose movement to water that is more under the control of the farmer... Good practice for sprayer filling/emptying/cleaning and minimising erosion and spray drift could avoid further withdrawals of designated priority substances...
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The aim of the project is to increase knowledge of moisture and how it interacts with varying soil types, management practices and rainfall events... Soil moisture probes have been utilised for a number of years within the irrigation industry and have become critical for irrigation scheduling, crop management and monitoring of weather events... Differences in surface conditions including groundcover, slope, soil compaction, cultivation treatments, plant and stubble architecture, crop residue and localized drainage can have a marked influence on whether rainfall infiltrates the soil or runs...
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Comparison of the number and percentage of sampled crops infected with viruses in Victoria and South Australia between 2000-05 and 2006-07... Vein-banding with yellowish line patterns, symptoms more clear on young leaves mottling through to leaf deformation, severe stunting, premature senescence.. Apical necrosis, chlorosis, premature senescence, reddening of leaves and stunting..
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Getting nitrogen (N) into the crop efficiently and effectively.. A system level assessment of NUE can be made using a partial nutrient balance (N removed in grain/N applied) and partial factor productivity (grain produced/N applied)... There would need to be compelling circumstances to justify moving away from top-dressed urea applied to the crop as the season unfolds...
Catalogue: 
In a trial at Trangie Agricultural Research Centre over two seasons (2011 and 2012) the grain yield and grain protein concentration of EGA Gregory wheat following chickpeas was similar to wheat following canola that was fertilised with 46 kg/ha N. The application of 46 kg/ha N in June 2012 to the wheat significantly increased the 2012 wheat yield by 400 kg/ha and 1.4 % protein regardless of previous crop (Figure 2)... For dry matter measured at maturity (GS99), there was a significant increase for the 25 kg/ha N rate compared with the nil rate, with no further increase in dry matter from i...
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