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soil microorganism

Catalogue: Ground Cover
Biological suppression may cut root disease losses - By Sharon Watt.. The research involves a focus on how the environment and management practices influence levels of Rhizoctonia inoculum that initiate the disease and the extent of infection in cereal crops... Dr Vadakattu says measures targeting both the Rhizoctonia inoculum and the infection itself are needed to help control the disease...
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Catalogue: Ground Cover
Biological suppression may cut root disease losses - By Sharon Watt.. The research involves a focus on how the environment and management practices influence levels of Rhizoctonia inoculum that initiate the disease and the extent of infection in cereal crops... Dr Vadakattu says measures targeting both the Rhizoctonia inoculum and the infection itself are needed to help control the disease...
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Catalogue: GRDC Research Summaries
We propose to use a polyphasic approach involving (i) comparative analysis of high- and low-suppressive soils, (ii) pre-treatment or prior exposure of soils to factors that have been attributed to the development of disease suppression and (iii) amplification of target regions prior to high-throughput sequencing... The use of direct soil DNA/RNA extraction technologies will help overcome the bottlenecks associated with the culture based methods... We propose to establish close working links with other projects in SBI-Theme 3 for field sites used, consistency in methodologies and complementary research approaches...
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Catalogue: GRDC Research Summaries
We propose to use a polyphasic approach involving (i) comparative analysis of high- and low-suppressive soils, (ii) pre-treatment or prior exposure of soils to factors that have been attributed to the development of disease suppression and (iii) amplification of target regions prior to high-throughput sequencing... The use of direct soil DNA/RNA extraction technologies will help overcome the bottlenecks associated with the culture based methods... We propose to establish close working links with other projects in SBI-Theme 3 for field sites used, consistency in methodologies and complementary research approaches...
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Catalogue: Ground Cover
Pursuing the mystery of disease-suppressive soils.. The GRDC is funding a suite of projects to identify and harness the biological traits associated with suppressive soils.. Mechanisms of disease suppression are identified using RNA sequencing technology to examine the genes that are switched on in suppressive and non-suppressive soils prior to sowing and six to eight weeks after sowing, when young plants can be infected by R. solani ...
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Catalogue: Ground Cover
The GRDC is funding a suite of projects to identify and harness the biological traits associated with suppressive soils.. The project is looking to identify the key organisms involved in the suppression of root lesion nematodes and which soils might best support these organisms... Mechanisms of disease suppression are identified using RNA sequencing technology to examine the genes that are switched on in suppressive and non-suppressive soils prior to sowing and six to eight weeks after sowing, when young plants can be infected by R. solani ...
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Catalogue: Ground Cover
Soil organic matter has three fractions: particulate organic carbon is decomposing plant material being broken down by microorganisms; humus organic carbon is the remains of the broken-down particulate fraction and new material created by the organisms involved in decomposition; and resistant organic carbon is inert material, mostly charcoal... The trial found that further down the soil profile, adding nutrients also increased the amount of soil carbon when compared with stubble with no nutrients added... Each group is investigating the opportunities to increase soil carbon by comparing standing stubble with and without added nutrients, incorporated stubble with and without nutrients, and removed stubble with and without nutrients...
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Catalogue: Ground Cover
Rethink on soil organic carbon benefits.. The trial found that further down the soil profile, adding nutrients also increased the amount of soil carbon when compared with stubble with no nutrients added... Each group is investigating the opportunities to increase soil carbon by comparing standing stubble with and without added nutrients, incorporated stubble with and without nutrients, and removed stubble with and without nutrients...
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Catalogue: Ground Cover
Recent research suggests that nitrogen tie-up may improve the ability of soils to hold nitrogen in the root zone where it is most needed By Bernie Reppel.. CSIRO Land and Water scientist Jeff Baldock says the tie-up process can also be a positive in a wellfunctioning farming system if it improves the soil"s ability to hold nitrogen in the root zone, preventing it from leaching too far down for crop roots to reach... "Work by my fellow soil scientists Dr David Roget and Dr Gupta Vadakattu suggests that soils with good levels of biological activity can hold up to 40 kilograms of nitrogen per hectare in the root zone for subsequent release and use by plants," Dr Baldock says...
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Catalogue: GRDC Final Reports
The potential for changes in soil microbial function for improved productivity through intensive cropping systems were evaluated in this project... A resilience test in which soils are exposed to repeated wet-dry cycles provides a suitable assay to determine changes in the stability of microbial functions... Results from the project demonstrated the likelihood of changes in microbial functions relevant for increased nutrient efficiency and productivity by altering C inputs through the use of intensive cropping systems...
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