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microorganism

Catalogue: GRDC 2014 Research Summaries
" Managing soil microorganisms to unlock the P bank in soil: Taking back what.. Much of the remaining fertiliser P becomes fixed in soil and the P 'bank' in Australian arable soils is estimated to be worth $10 billion, or 100 kg P/ha of arable land (Cornish 2009)... The Australian grains industry needs new strategies to increase plant access to fixed P in soil that don "t compromise productivity, income or soil fertility  Let "s take back what "s ours!This project will identify practical agronomic strategies allowing grain growers to pro-actively manage microbial release of fixed P and P uptake by grain crops...
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Catalogue: GRDC Updates
The structure of roots is a consequence of their primary functions- growing through an abrasive medium (the soil), acting as plumbing to absorb and transport water to the shoot, and actively and selectively absorbing essential nutrients such as mineral N (nitrate and ammonium), inorganic P and K. the structure of leaves is designed to absorb radiation for photosynthesis, regulate evaporative losses of water, act as a sink for nutrients and water transported from the root system, and produce carbohydrates from photosynthesis... The root surface comprises a layer of epidermal ('skin') cells (some with extensions or 'root hairs') that absorb water through their cell walls and cell membranes and which have specific sites where nutrient forms such as nitrate, ammonium, phosphate and potassium are bound onto 'carrier' molecules and transported across the cell membrane into the interior of the cell... Any so-called microbial activators or mineral-solubilising microorganisms are operating in a hostile environment full of competitors...
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Catalogue: GRDC Updates
It is extremely important to use farm management practices that maintain organic matter levels, especially biologically available organic matter in our soils... Australian soils are inherently low in biologically available carbon carbon inputs have a major influence on soil biological activity... For an introduced biocontrol agent to be effective it must first survive, establish, acclimatize and grow in field soils and interact with the pathogenic organisms alone or in the presence of plant...
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