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calcareous soil

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 Media
Dr Mike McLaughlin, a GRDC Southern Regional Panel member, says having soils tested to assess their P status could save growers significant input costs this year... Lower than normal maintenance rates of fertiliser P will in some instances be sufficient this coming season... Having soils tested to assess their P status could save growers significant input costs, says Grains Research and Development Corporation (GRDC) Southern Regional Panel member Dr Mike McLaughlin...
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Catalogue: GRDC Media
Dr Mike McLaughlin, a GRDC Southern Regional Panel member, says having soils tested to assess their P status could save growers significant input costs this year... Lower than normal maintenance rates of fertiliser P will in some instances be sufficient this coming season... Having soils tested to assess their P status could save growers significant input costs, says Grains Research and Development Corporation (GRDC) Southern Regional Panel member Dr Mike McLaughlin...
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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 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 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)
Based on this, we estimate that water used by weeds in the wet weedy (+I+W) treatment up to the midfallow period was 593 x 1688 (biomass) / 10 000 = 100 mm; for the dry weedy (-I+W) treatment water use is estimated at 30 mm... The results showed that Zn uptake by plants and in the grain could be most improved by mixing Zn with N and P (as technical grade MAP and ammonium nitrate dissolved in water) in a single solution and injecting it into the soil to a depth of 40 cm... Results from our laboratory experiments have confirmed that fluid forms of P have very different physical and/or chemical effects on soil in the fertilizer band in calcareous soils, and improve plant P uptake...
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Catalogue: GRDC Updates (South)
Based on this, we estimate that water used by weeds in the wet weedy (+I+W) treatment up to the midfallow period was 593 x 1688 (biomass) / 10 000 = 100 mm; for the dry weedy (-I+W) treatment water use is estimated at 30 mm... The results showed that Zn uptake by plants and in the grain could be most improved by mixing Zn with N and P (as technical grade MAP and ammonium nitrate dissolved in water) in a single solution and injecting it into the soil to a depth of 40 cm... Results from our laboratory experiments have confirmed that fluid forms of P have very different physical and/or chemical effects on soil in the fertilizer band in calcareous soils, and improve plant P uptake...
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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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