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legume residue

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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 Factsheets
Nitrogen fixation by crop legumes reduces the need for fertiliser nitrogen (N) and emissions of nitrous oxide... Benefits from legumes can be maximised by using high-yielding legume varieties that are not constrained by poor management, insects, disease, weeds or nutrient deficiencies... amounts of n Nitrogen fixation by crop legumes has now been estimated in many studies...
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Catalogue: GRDC Factsheets
Nitrogen fixation by crop legumes reduces the need for fertiliser nitrogen (N) and emissions of nitrous oxide... Benefits from legumes can be maximised by using high-yielding legume varieties that are not constrained by poor management, insects, disease, weeds or nutrient deficiencies... amounts of n Nitrogen fixation by crop legumes has now been estimated in many studies...
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Catalogue: GRDC Media
Understand the factors that affect mineralisation.. The rate of mineralisation varies with soil temperature, water content and, depending on the soil type, it can vary with the amount of organic matter and residues, and pH - mineralisation is slower in acidic soils... During the growing season, the amount of mineralisation is reasonably predictable and models are available that will estimate mineralisation over time periods ranging from days to years...
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Catalogue: GRDC Media
Understand the factors that affect mineralisation.. The rate of mineralisation varies with soil temperature, water content and, depending on the soil type, it can vary with the amount of organic matter and residues, and pH - mineralisation is slower in acidic soils... During the growing season, the amount of mineralisation is reasonably predictable and models are available that will estimate mineralisation over time periods ranging from days to years...
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Catalogue: GRDC Media
Dr Mark Peoples (pictured) says that both fertilisers and legumes have a role to play in supplying N... "The trials demonstrated that, as expected, rotations that resulted in highest returns of fixed to the soil were brown manured crops, and grazed or hay-cut legume pastures , since large amounts of N are removed from pulse crops in the harvested grain," Dr Peoples said... Legumes also have other benefits, including increasing soil organic fertility, weed and disease management, and the development of beneficial soil biology growers should consider both options as both have a place within a farming system...
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