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soil system

Catalogue: GRDC Media
The latest in evidence-based scientific data on cropping soils, carbon sequestration and farming systems will be presented at the upcoming Grains Research and Development Corporation (GRDC) Update being held in Goondiwindi... World renowned expert in soil systems, Professor Iain Young from the University of New England will explore soil, plant and microbe interactions in cropping soils and provide an international perspective that advisers and growers can't afford to miss... "The Update is a chance for growers and advisers to tap into the latest research, liaise with our expert local and international guest speakers and become better informed on ways to boost productivity on farm in a more sustainable manner."..
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Catalogue: GRDC Media
Australian research is beginning to reveal the impact of farming practices on soil microbiology and how this affects the supply of yield-boosting nutrients to crops... Dr Phillips said research was exploring whether previous crops influenced microbial community functioning in subsequent cropping years; whether differences in the amount and quality of residue/stubble impacted microbial communities responsible for transforming organic and mineral N to plant-available N; and whether agronomic practices such as tillage and depth of fertiliser placement could be strategically used to manipulate N-cycling microbial communities... Caption: Soil microbiologist Lori Phillips says current research is aimed at determining the make-up of microbial communities in the soil, their role in nutrient cycling and how farming practices influence microbial activity...
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Catalogue: GRDC Publications
Overall, soil CEC and SOC content was greatest in the 0.2 and 0.2-2 m fraction, indicating that size, and probably type, of SOM influenced CEC... Kaiser et al. (2003) found that soils with a high content of black carbon showed increased sorption ability compared with plant- and microbial-derived SOM... Addition of organic amendments can increase P availability to plants by decreasing the P adsorption capacity of soils...
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Catalogue: Ground Cover
Managing microbes to manage nitrogen.. Research into soil microbes may identify ways to keep more nitrogen in the soil and available to crops... By studying how nitrogen is processed in soil systems and which microbes are responsible, Dr Phillips can explore how agronomic practices influence those microbial communities and improve nitrogen uptake...
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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 Final Reports
Alkaline soils occupy about 23.8% of total land area in Australia... The project has shown that application of gypsum and growing of legumes can effectively reduce the soil pH below 9.0... Our experiments have shown a higher correlation between CROSS and clay dispersion (as well as relative hydraulic conductivity) of alkaline soils than the correlation with SAR...
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