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Catalogue: GRDC Media
Survey maps northern region nematodes.. "The survey assessed 132 focus paddocks around sowing time in 2010 in twelve agronomy districts (10-12 paddocks per district) from Dubbo to the Queensland border and west to Warren, Walgett and Mungindi," Dr Simpfendorfer said... "Soil populations of Pt were also generally higher with 23pc of paddocks having Pt levels representing a risk of yield loss in 2010 compared to only 2pc of random paddocks with Pn ," Dr Simpfendorfer said...
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Catalogue: Ground Cover
An Oregon State University scientist notified the US Department of Agriculture (USDA) in May that some wheat volunteers found in a field were GM herbicide tolerant... The last field trials of the GM wheat in Oregon occurred in 2001, and there were no field trials on the farm where the GM wheat was found... That's about 50 per cent more than what we currently produce," Ms Watkins said...
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Catalogue: GRDC 2014 Research Summaries
" Managing soil microorganisms to unlock the P bank in soil: Taking back what.. Much of the remaining fertiliser P becomes fixed in soil and the P 'bank' in Australian arable soils is estimated to be worth $10 billion, or 100 kg P/ha of arable land (Cornish 2009)... The Australian grains industry needs new strategies to increase plant access to fixed P in soil that don "t compromise productivity, income or soil fertility  Let "s take back what "s ours!This project will identify practical agronomic strategies allowing grain growers to pro-actively manage microbial release of fixed P and P uptake by grain crops...
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Catalogue: Ground Cover
Deep fertiliser placement to restore productivity.. Subsoil constraints highlighted by GRDC-funded research since 2006 have prompted a new approach to fertiliser applications for the Black family near Toowoomba, Queensland.. "The residual effects of deep-banded immobile nutrients, such as phosphorus, mean that nutrients not taken up by plants in a wet season will remain where they have been placed in the subsoil [down to 20cm] and be available to subsequent crops in lower rainfall conditions."..
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Catalogue: Ground Cover
"Plant roots tend to draw more nutrients from deep in the soil profile as they forage for moisture in dry conditions," Dr Bell says... "The residual effects of deep-banded immobile nutrients, such as phosphorus, mean that nutrients not taken up by plants in a wet season will remain where they have been placed in the subsoil [down to 20cm] and be available to subsequent crops in lower rainfall conditions.".. Dr Bell says that the Blacks' deep-banding approach to fertiliser applications targeting the subsoil could help shield them from productivity losses that might otherwise result from climate variability, pests and diseases...
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Catalogue: Ground Cover
Recent research has found that plants react defensively to both classes of microbes, raising new questions about conventional approaches to managing soil microbes for crop health... Researchers such as Canadian-born Dr Jonathan Plett have established that even beneficial rhizobial microbes that form root nodules and provide plant with nitrogen are actually acting a lot like plant diseases... "Rhizobia are able to fool the plant to some degree, taking over control of some biological functions so the plant can't fight off the invading microbes," Dr Plett says...
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Catalogue: Broadacre Field Crops DAFF QLD
Rhopalosiphum rufiabdominalis can be quite abundant on below-ground parts of winter cereals, but are more noticeable during periods of moisture stress... Rice root aphids suck fluids from the plant roots, but only do so when the bases of plants are exposed... Rice root aphids cannot be controlled using contact insecticides because of their below-ground location on plants...
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Catalogue: Broadacre Field Crops DAFF QLD
Rhopalosiphum rufiabdominalis can be quite abundant on below-ground parts of winter cereals, but are more noticeable during periods of moisture stress... Rice root aphids suck fluids from the plant roots, but only do so when the bases of plants are exposed... Rice root aphids cannot be controlled using contact insecticides because of their below-ground location on plants...
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Catalogue: Broadacre Field Crops DAFF QLD
Rhopalosiphum rufiabdominalis can be quite abundant on below-ground parts of winter cereals, but are more noticeable during periods of moisture stress... Rice root aphids suck fluids from the plant roots, but only do so when the bases of plants are exposed... Rice root aphids cannot be controlled using contact insecticides because of their below-ground location on plants...
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Catalogue: GRDC Updates
The aim of the investigation was to assess the infectivity and the subsequent effect of salinity on mycorrhizal fungal communities in a saline environment... That there was no difference in total mycorrhizal root length between the non-saline and moderately saline treatment at week 15 could also suggest that the mycorrhizas were able to germinate and colonise roots at some salt levels, highlighting a degree of tolerance... The results of the experiment have demonstrated that the mycorrhizal fungi at this field site display low infectivity at high salinity levels but do express a degree of salt tolerance at lower saline levels...
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