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cropping rotation

Catalogue: GRDC Updates
In the first year the trial consisted of four crops (lupin, canola, wheat and barley) planted into a pasture paddock along with self sown strips of pasture... Plant densities and damage by invertebrates was assessed at 14 and 28 days post-seeding... We observed that invertebrate species that are influenced by stubble retention practices such as bronzed field beetle, earwigs, were in higher numbers under crop residues than where stubble was absent...
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Catalogue: GRDC Media
Growing break crops in a well-managed way can significantly and consistently boost the yields and profits of subsequent wheat crops in good seasons and reduce overall farming risks... Dr Lawes said an analysis of 30 years of data from across the WA grainbelt using the crop and economic modelling systems APSIM and LUSO indicated there was a 0.6 tonne per hectare average yield benefit in wheat crops grown after a lupin break crop and 0.4t/ha benefit following canola, compared with wheat grown after wheat... "We found the first wheat crop in a continuous wheat sequence could increase costs and depress yields in the second and third year wheat crops and reduce the probability of these subsequent wheat crops making a profit," he said...
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Catalogue: GRDC Media
Growing break crops in a well-managed way can significantly and consistently boost the yields and profits of subsequent wheat crops in good seasons and reduce overall farming risks... Dr Lawes said an analysis of 30 years of data from across the WA grainbelt using the crop and economic modelling systems APSIM and LUSO indicated there was a 0.6 tonne per hectare average yield benefit in wheat crops grown after a lupin break crop and 0.4t/ha benefit following canola, compared with wheat grown after wheat... "We found the first wheat crop in a continuous wheat sequence could increase costs and depress yields in the second and third year wheat crops and reduce the probability of these subsequent wheat crops making a profit," he said...
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Catalogue: Ground Cover
University of Adelaide scientists mapping the extent of herbicide resistance in annual ryegrass across southern Australia's high-rainfall zone (HRZ) have concluded that pre-emergent herbicide use is essential... The GRDC-supported research, involving varying weather patterns, topography and soil types, indicates options such as Sakura plus Avadex Xtra or Sakura followed by Boxer Gold post-emergent can provide effective control of annual ryegrass in the HRZ... The university's research included random farm surveys across south-eastern Australia to map ryegrass herbicide resistance in the HRZ, and the findings from these surveys will be incorporated into a new national resistance-mapping tool developed by Bayer (see Weed resistance maps help navigate herbicide options )...
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Catalogue: Ground Cover
Summer sowing hard-seeded annual pasture legumes, using seed harvested on-farm, has been a robust method of establishing pastures on Mike O'Hare's New South Wales property.. Ms Hackney says the high feed availability of all species, but particularly the biserrula, in autumn/winter is of substantial value to mixed-farming enterprises and has implications for increased nitrogen fixation for subsequent crops... Overall, lamb live-weight gains averaged 350 grams per head per day when measured over 56 days during spring 2014...
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Catalogue: GRDC Updates
Specific management practices alter the abundance and activity of microbes capable of processing both organic and mineral-N... Once we better understand the soil biological and chemical factors governing N-transformations in our agricultural systems, we can determine how agronomic practices can be used to synchronise N supply, from both fertiliser and soil sources, with crop demand... A primary goal of this project was to develop and use molecular tools to detect these N-cycling communities in Australian agricultural systems...
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Catalogue: GRDC Updates
Wheat yield 1 year, 2 years and 3 years after break, showing benefit of breaks compared to continuous wheat (dotted 1:1 line)... Cumulative yield of wheat over 3 years after breaks showing benefit of breaks compared to continuous wheat (1:1 line)... Four year cumulative gross margins have been calculated for each soil type x crop sequence combination where breaks were grown in 2009 (Table 2)...
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