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critical temperature

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Catalogue: GRDC Updates
Take home message Low temperatures and frost caused losses up to 100% in many 2009 chickpea crops Chickpeas won't hold a pod until average daily temperature reaches15C Temperature records in the canopy can explain why flowers and pods abort Plant at the optimum time to maximize WUE and yield and minimise frost damage.. The low temperature effects on chickpea reproduction were exacerbated by frosts on 28 Sep and (in some places) 8 Oct 09... Conclusions Low temperatures and frost caused losses up 100% in many 2009 chickpea crops Chickpeas don't form fertile flowers and keep pods until average daily temperature reaches15C Temperature readings, preferably collected in the canopy, can be used to explain why flowers and pods abort Planting at the optimum time maximises WUE and yield and can minimise frost damage..
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Catalogue: GRDC Updates
Several I & I NSW projects in central western NSW in 2009 aimed to gather data on a number of different wheat varieties that have been quickly adopted as preferred varieties and to compare them to older more well known varieties... To establish some baseline phenology data, a selection of wheat varieties were grown under irrigation and sown at three sowing dates (Figure 1)... Observations recorded 15 August showed marked differences between individual varieties with the effects of plant population having an impact on the rate of crop development as soil moisture was progressively becoming a major limiting factor (Figure 3)...
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Catalogue: Ground Cover
Dr Viola Devasirvatham undertaking a chickpea heat-tolerance field experiment at the Plant Breeding Institute at Narrabri... The discovery of heat-tolerant chickpea genotypes may improve the reliability of yields in the northern grainbelt of Australia and other semi-arid environments around the world... Crop phenology (days to first flowering, days to 50 per cent flowering, days to first pod and days to maturity), growth (plant height, plant width and biomass at harvest) and grain yield (including pod number per plant, filled pod number per plant and seed number per plant) were recorded in both seasons...
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Catalogue: GRDC Updates (West)
P4/S9 and P2/S4 were the two most profitable sequences and, overall, the 'maximum profit - P4' philosophy had the highest mean gross margin... It is logical that those growers that have chosen to have no livestock will have no interest in trialling grazing crops... Overall, the data has indicated that for the biserrula inoculant all of the carrier's have difficulties in carrying enough live rhizobia numbers to adequately nodulate the legume hosts after 3-4 months of dry, hot soil...
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