The dynamics of organic matter turnover in soils to improve the productivity of Australia's agricultural industries. Two recent national reports on the soils issues facing Australian agriculture (Reeves et al, 1997; CSIRO, 2000) concluded that soil structural degradation remains, after salinisation, our major threat to the sustainability of agricultural production. This research will provide fundamental understanding of how the dynamics of organic matter turnover benefit aggregate formation and ....The dynamics of organic matter turnover in soils to improve the productivity of Australia's agricultural industries. Two recent national reports on the soils issues facing Australian agriculture (Reeves et al, 1997; CSIRO, 2000) concluded that soil structural degradation remains, after salinisation, our major threat to the sustainability of agricultural production. This research will provide fundamental understanding of how the dynamics of organic matter turnover benefit aggregate formation and stability. This will advance the understanding of organic matter from simply considering the quantity of carbon present, to one of predicting the short- and long-term benefits to soil structure. This approach is innovative in the study of soil health, and has the potential to greatly advance the development of conservation farming systems.Read moreRead less
The critical role of rhizosheath biophysics in plant water availability. This project aims to determine how plants can increase their water availability by altering the small volume of soil, rhizosheath that adheres to roots.
This project expects to integrate root exudates metabolomics, biophysics and microbial ecology to determine for the first time which of a suite of interconnected factors increase water availability in the root zone.
Expected outcomes include better understanding of the ....The critical role of rhizosheath biophysics in plant water availability. This project aims to determine how plants can increase their water availability by altering the small volume of soil, rhizosheath that adheres to roots.
This project expects to integrate root exudates metabolomics, biophysics and microbial ecology to determine for the first time which of a suite of interconnected factors increase water availability in the root zone.
Expected outcomes include better understanding of the direct and indirect roles of soil pore geometry, root exudates and microbial communities play in shaping plant’s ability to take up water from soil. This knowledge may ultimately pave the way for engineering the rhizosheath of crops to cope with increased drought conditions.
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The connectivity of pore theory - does it influence microbial community composition and function? Climate change scenarios indicate that Australia will be directly affected by an increase in greenhouse gas emissions. Soil microbial activity is responsible for a large proportion of such emissions; therefore it is important that we understand how such changing climate patterns are likely to influence key microbial populations in soil, particularly those involved in the production of greenhouse ga ....The connectivity of pore theory - does it influence microbial community composition and function? Climate change scenarios indicate that Australia will be directly affected by an increase in greenhouse gas emissions. Soil microbial activity is responsible for a large proportion of such emissions; therefore it is important that we understand how such changing climate patterns are likely to influence key microbial populations in soil, particularly those involved in the production of greenhouse gases. This research interfaces two disciplines, earth and biological sciences, and will establish a new international collaboration that will ensure Australia is at the forefront of a rapidly developing research field.Read moreRead less
Securing soil and water using carbon. This project will ascertain the role of sequestered carbon in positively impacting on chemical, physical and biological and associated feedback mechanisms in order to increase the capacity of soil to store water and carbon. This information will allow us to maximise our ability to manage and rehabilitate Australia's increasing degraded soil resource.
Integrating microbiology and climatic drivers to determine triggers for nitrous oxide emissions from arable soils in semi-arid Western Australia. Increasing nitrous oxide emissions from soil to the atmosphere are a concern as they contribute to global warming and the destruction of the ozone layer. While 70-81% of this increase has been attributed globally to agricultural soils, the factors controlling emissions from arable soils in southern Australia are not well understood. We aim to charact ....Integrating microbiology and climatic drivers to determine triggers for nitrous oxide emissions from arable soils in semi-arid Western Australia. Increasing nitrous oxide emissions from soil to the atmosphere are a concern as they contribute to global warming and the destruction of the ozone layer. While 70-81% of this increase has been attributed globally to agricultural soils, the factors controlling emissions from arable soils in southern Australia are not well understood. We aim to characterise and model the relationship between the soil microbial community responsible for nitrous oxide emissions and soil water availability. Understanding the processes responsible for nitrous oxide emissions will enable us to change the way we manage our semi-arid soils so as to minimise nitrous oxide emissions.Read moreRead less