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legume nitrogen

Catalogue: GRDC Media
Studies have revealed that growing crop legumes in rotation with cereals can often reduce the need for nitrogen fertiliser inputs by 40 to 80 kilograms per hectare, and improve crop productivity... Basic principles and practical management information relating to nitrogen fixation by crop legumes is contained in a new fact sheet released by the Grains Research and Development Corporation (GRDC)... The ability of legumes to form a mutually beneficial association with rhizobia and fix atmospheric nitrogen gas enables them to grow in almost any soil without nitrogen fertiliser...
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Catalogue: GRDC Final Reports
Each year, growers in the northern grains belt make decisions about the amount of fertiliser nitrogen (N) they are going to apply to approximately four million hectares of paddock, with the vast majority of decisions made without the benefit of soil testing... From the validation work that has been done, it is clear that 'NBudget' can assist growers and advisers to fine tune N management decisions provided they have adequate records from the previous season, i.e. prior grain yields and proteins and fertiliser N inputs for the particular paddock... The 'NBudget' algorithms are also incorporated into CropChooser on the original CropMate website, thereby providing potential users with a tool to compare the economics of various cropping options (i.e. gross margin analyses) in which N and biological effects have been valued and the value attached to the crop, rather than the cost of production of the following crop...
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Catalogue: GRDC YouTube channel
For a fact sheet go to http://www.grdc.com.au/GRDC-FS-ReducingNLoss 1.1: GCTV Ep#13 Denitrification 3.3: Narrator: Jane Drinkwater Nitrogen is the largest nutrient input in 8.32: northern Australian cropping systems, but as well as water leaching it deep into the 12.87: soil profile, nitrogen can be lost to the atmosphere through denitrification... 232.55: Narrator: The project is part of a national initiative 235.69: called NANORP, which includes research into aspects affecting N2 to N2O ratios, the use 242.13: of different inhibitors to control nitrification rates, and the use of feed lot manures and 247.97: waste water treatment plant bio solids as sources of nitrogen... 291.72: Mike Bell: I think it is important for growers to recognize 295.54: when those denitrification events occur, soil test to see how much nitrogen they have lost, 301.98: and then adjust the fertiliser rates ...
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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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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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