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soil ameliorants

Catalogue: GRDC Final Reports
Large-scale field experiments on sandy and clay soils at Merredin, Nungarin, Tammin, Kellerberin and Corrigin shires (Western Australia) were conducted by Dr M A Hamza (in collaboration with growers) to find the optimum combination(s) of ripping depth and tine spacing for maximum yield... The major finding was that the depth of ripping could be reduced to 30cm provided that tine spacing was no wider than 30cm... A supplementary outcome was addressed, facilitated by acquisition of a shallow leading tine (SLT) ripper donated by AGROWPLOW and an air-seeder bin funded by GRDC...
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Catalogue: Ground Cover
Craig Thompson bought a WEEDit precision sprayer seven years ago and says it has become a crucial tool for summer weed control... A stark drop in growing-season rainfall in WA's northern wheatbelt means growers have to get crop roots much deeper into the soil profile to access moisture.. Craig says that wheat-on-wheat, with the aid of Clearfield wheats, has simplified the system and allowed him to concentrate on the single most important element - holding on to every drop of rain that falls...
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Catalogue: GRDC Final Reports
The investigation has revealed that there exists a lack of information in Australia relating to the use of organic by-products as fertilisers and soil ameliorants in its cropping systems... While research has been conducted using piggery, chicken, cattle manures and biosolids, it has only been very short term and mostly at rates designed to show an effect within the short time- frame of funding rather than at application rates growers can reasonably be expected to use... At the locations, the application of different forms of by-product at different rates and levels of soil incorporation would be assessed for impacts on yield and soil quality over five seasons...
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Catalogue: Nuffield Scholar Reports
Investigation of Zero-Till Farming Systems (ZT) in high rainfall cropping zones (HRZ), and its impact on soil biology and nutrient cycling.. Over time the farmer can achieve an increase in yields, with a decrease in some inputs such as fertiliser and chemicals... The other problem is that when soil is cultivated respiration and oxidisation occurs and lot of valuable plant nutrients are burnt off and not be available later when the plant needs them as discussed earlier...
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Catalogue: GRDC Research Summaries
Finding the pieces that maximise water use efficiency.. The variation within the strips can be used to tease out soils that are more or less responsive to ameliorative treatments... There are also opportunities to develop other products from the soils and geophysics data sets that will help farmers increase their water use efficiency through improved recognition and remediation of constraints...
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Catalogue: GRDC Final Reports
Improving compacted soils in the eastern wheatbelt.. The pore spaces between soil aggregates are enlarged and can hold and conduct more water increasing the ability of the soil to store and supply water... A combination of deeper ripping and closer tine spacing can give larger yield increases...
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Catalogue: Ground Cover
The Agronomy Jigsaw project in the Esperance region could help growers who are grappling with appropriate water use for different soil types... "Techniques used in these surveys - electromagnetic induction and gamma radiometrics - can tell us about underlying soil properties, which can help us predict the amount of water available to plants in the soil. ".. The project has a number of field trials using soil ameliorants, such as gypsum and lime, to increase plant-available water and potentially improve water use efficiency," he says...
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Catalogue: Ground Cover
The Agronomy Jigsaw project in the Esperance region could help growers who are grappling with appropriate water use for different soil types... "Techniques used in these surveys - electromagnetic induction and gamma radiometrics - can tell us about underlying soil properties, which can help us predict the amount of water available to plants in the soil. ".. The project has a number of field trials using soil ameliorants, such as gypsum and lime, to increase plant-available water and potentially improve water use efficiency," he says...
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