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soil constraint

Catalogue: GRDC Updates (West)
Mention of a trade name or company in this publication does not imply endorsement of any product or company by the Department of Agriculture and Food, Western Australia... Overall, the DAFWA indices suggest that a more optimistic approach to decision-making is recommended in 2006 and confidence in this assessment would be enhanced if a La Ni a develops... The needs analysis has enabled an assessment of the distribution of farmers along the pathway from initial awareness through to final adoption of CRM information and tools being offered by various organisations...
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Catalogue: GRDC Media
Western Australian researchers investigating biochar have unearthed some promising results about its properties... UWA Institute of Agriculture Associate Professor Daniel Murphy, who is leading WA research under the GRDC biochar project, said new studies had also shown that biochar did not affect the rate at which nitrogen was released from the decomposition of organic matter in soil... "Biochar is a stable form of carbon which can remain in the soil for hundreds of years - we need to be very sure about its attributes before making recommendations about its use," Professor Murphy said...
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Catalogue: GRDC Updates (West)
Phosphorus management is characterized by an initial build-up phase that corrects P deficiency followed by a maintenance phase after soils reach the Colwell P values needed for near maximum production (critical values)... For example, if we removed 5 kg P/ha in the form of P contained in grains and we applied 10 kg P/ha as fertiliser, then the P balance efficiency is 5/10x100 = 50 %. P balance efficiency allows us to assess along with soil test P data if we are building-up, maintaining or depleting soil P... We estimate that about 87% of the wheat paddock soil samples examined are no longer P deficient (exceed their critical values)...
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Catalogue: GRDC Factsheets
a realistic understanding of the soil's capacity to store water will improve decisions about the potential return on crop inputs and other management practices... improving water use efficiency may require effort over several years to improve the soil's ability to capture and store water, or to make stored water available to plants... Water use efficiency (WUE) is a measure of a crop's capacity to convert water into plant biomass or grain...
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Catalogue: GRDC Factsheets
a realistic understanding of the soil's capacity to store water will improve decisions about the potential return on crop inputs and other management practices... improving water use efficiency may require effort over several years to improve the soil's ability to capture and store water, or to make stored water available to plants... Water use efficiency (WUE) is a measure of a crop's capacity to convert water into plant biomass or grain...
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Catalogue: GRDC Factsheets
a realistic understanding of the soil's capacity to store water will improve decisions about the potential return on crop inputs and other management practices... improving water use efficiency may require effort over several years to improve the soil's ability to capture and store water, or to make stored water available to plants... Water use efficiency (WUE) is a measure of a crop's capacity to convert water into plant biomass or grain...
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Catalogue: GRDC Media
Western Australian grain growers intending to apply clay to paddocks in coming months can access the latest information about claying techniques from an online resource... All claying techniques ameliorate the soil by increasing the clay content in the topsoil and the effect generally lasts for about 10 years... The GRDC's investment in non-wetting soils research is part of the major collaborative research effort Soils Constraints - West which aims to develop and deliver solutions for a range of soil constraints limiting productive grain cropping in WA...
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Catalogue: Ground Cover
GRDC Western Panel chair Peter Roberts says the new project, starting in July 2016, is focused on forest gravel soils as they are the dominant soil type across about three million hectares of Western Australia's high-rainfall cropping zone... "Gravel contained in the soil can adversely affect the soils' water-holding capacity, acidity, organic matter, root growth, nutrient supply, and the effectiveness of fertiliser and herbicide applications... The project is part of the GRDC's new External Investment Plan 2016-17, which is also exploring crop heat tolerance, weeds, slugs and snails, legumes in low and medium-rainfall zones, education resources, biosecurity, karnal bunt fungal disease, and soil water and nutrients...
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Catalogue: Ground Cover
GRDC Western Panel chair Peter Roberts says the new project, starting in July 2016, is focused on forest gravel soils as they are the dominant soil type across about three million hectares of Western Australia's high-rainfall cropping zone... "Gravel contained in the soil can adversely affect the soils' water-holding capacity, acidity, organic matter, root growth, nutrient supply, and the effectiveness of fertiliser and herbicide applications... The project is part of the GRDC's new External Investment Plan 2016-17, which is also exploring crop heat tolerance, weeds, slugs and snails, legumes in low and medium-rainfall zones, education resources, biosecurity, karnal bunt fungal disease, and soil water and nutrients...
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Catalogue: GRDC Media
A study into the use of instantaneous pH probes inserted directly into moist soil to measure pH has found they are capable of making accurate measurements and are cheaper than traditionally used soil tests when many samples are required across a paddock... Soil pH is typically measured in WA by taking a soil sample and sending it to a laboratory where the soil is mixed in a solution of 1:5 CaCl2 and measured with a glass probe... But instantaneous pH probes provide the potential to relatively quickly and cheaply measure soil pH at many sites across a paddock, allowing pH and lime application maps to be drawn...
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