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Nutrition and fertiliser

Catalogue: Ground Cover
Studies are continuing to show that grain growers can get much more from their fertiliser budgets by checking their soils' phosphorus levels before sowing and more directly targeting inputs to crops that are clearly nutrient-limited... Mr Speirs, of MS&A, says at an Australian Premium White (APW) wheat price of $280 a tonne for a cost of $6 per unit of phosphorus, the return is 4:1 or 400 per cent... According to Mr Speirs, profitable nutrient management starts with knowing how many kilograms of grain will buy one kilogram of phosphorus...
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Catalogue: GRDC Media
Central Queensland wheat growers have seen low protein levels in this season's crop with the likely causes stemming from the long wet season of 2010-11... These include: low starting soil nitrogen as a consequence of low organic carbon (less mineralised nitrogen) and denitrification; applied bag nitrogen still being close to the surface and not located in moisture where the wheat plant roots could easily access it; crops growing poorly and unable to exploit all the available soil nitrogen; leaching; and soil erosion losses... Log in or register to leave a comment...
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Catalogue: GRDC Updates
Using Crop Sensors In the US, Europe and Australia there is increasing interest in using crop sensors mounted on farm machinery (boom mounted) to monitor crop canopy performance... Influence of nitrogen timing and rate on yield t/ha - Lubeck cv Annuello 2007 NDVI correlation with Green Area Index (GAI) There are, as outlined below, a number of issues that would need to be clarified before NDVI readings could be used to calculate nitrogen inputs for cereal crops... Strength of correlation between growth stage and NDVI readings recorded with the Greenseeker assessed at the Inverleigh SFS trial site, Southern Victoria in 2007 - cv Mackellar...
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Catalogue: GRDC Updates (West)
year 1 )3 a h / t2.5 ( d l e i2 y n i a r1.5 g 1 nil gypsum gypsum rain limited potential 0.5.. Cascade soils after 20 years conductivity profiles EC 0.5 1 1.5.. use 'pre-washed' sodium confirm likely response adsorption ratio to gypsum works in subsoils as well as topsoils gypsum moves to depth rapidly and is effective for many years (not winter grazing) Questions?..
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Catalogue: GRDC Publications
Identify where the benefits of fluid fertilisers are likely to be significant, in terms of climate, soil type and cropping system... The conclusion is that while there does not appear to be any yield advantage associated with using Flexi-N through the boom, as opposed to urea topdressed prior to sowing, there does appear to be an advantage when it is banded... The freight was approximately $40/tonne, compared to solid fertiliser delivered bulk, which is approximately $20/tonne...
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Catalogue: GRDC Updates
At current fertiliser prices and by using the products tested in this trial, the application of balanced N, P, Mg, K and Zn would increase wheat gross margins by approximately $77.60 /ha... The chemistry of P placement; banding versus broadcast Primary researchers: Kylie Dodd, Ganga Hettiarachchi and Mike McLaughlin In P responsive soils, fertiliser banding is used to increase efficiency by improving early root contact with the fertiliser... The results suggest that increased granular fertiliser efficiency with banding was primarily due to improvements in early root contact with fertiliser P rather than its effect on P fixation...
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Catalogue: GRDC Final Reports
The mechanisms responsible for effectiveness of fluid fertilisers in calcareous soils, and the ineffectiveness of granular P, were identified chemically and spectroscopically... Field experiments on calcareous and non-calcareous soils in the Victorian Wimmera and Mallee regions have also shown that fluid fertilisers can improve grain yields on these soil types, although the magnitude of grain responses were usually smaller than on the highly calcareous soils in South Australia... There is a growing demand for information on fluid fertilisers and their use in cropping in Australia, as demonstrated by the increasing hits to the fluid fertiliser website, and the growth in circulation of the Fluid Newsletter, and the popularity of the Fluid Workshop held in 2004...
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Catalogue: GRDC Updates (North)
GRDC values the contributions made by its research partners during the 2004 series of Grains Research Updates.. Overall, there were 50 comparisons, 45 showing a positive yield increase with fluid and 5 with no yield difference... Overall, there were 11 comparisons, with 4 yield decreases due to fluids and 7 with no yield differences...
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Catalogue: GRDC Updates (South)
GRDC values the contributions made by its research partners during the 2004 series of Grains Research Updates.. Overall, there were 50 comparisons, 45 showing a positive yield increase with fluid and 5 with no yield difference... Overall, there were 11 comparisons, with 4 yield decreases due to fluids and 7 with no yield differences...
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Catalogue: GRDC Factsheets
KEy pointS After decades of consistent phosphorus (P) application, many soils in the southern region now have adequate P reserves... As a result of this, along with high rates of P fertiliser being regularly applied, many soils in the southern grains region now have good soil P reserves... In a situation where 12 kilograms per hectare of applied P on 15 to 18cm row spacing has been recommended, the same result may be achieved with 9kg/ha of applied P if the crop were seeded on 25 to 30cm row spacing...
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Assigned key phrases

acidity (10)
fertiliser (261)
nitrogen (353)
nitrogoen (3)
nutirition (99)
nutrient (109)
nutrients (6)
nutrition (81)
phosphate (146)
phosphorous (124)
phosphorus (88)
potassium (124)
rhizobium (27)
sodium (11)
sulfur (35)
sulphur (13)