You are here

nitrate

Catalogue: GRDC Updates
Field trials on northwest NSW cracking clay soils (Vertosols) during 2011-2013 showed that surface application of urea led to ammonia volatilisation averaging 11% N loss when applied to fallow soils, and 5% N loss when applied to tillering wheat crops... Compared to urea, losses from ammonium sulfate were less, except when the soil contained >2% calcium carbonate (lime)... At the conclusion of the month, we sampled soils and plants (at in-crop and pasture sites) and measured soil nitrate and ammonium and plant total N. We did not measure N uptake into grain...
Related categories:
Catalogue: GRDC Updates (South)
NITROGEN - CATCHING MORE DOLLARS PER UNIT.. Gulargambone Grains Research Update 15 thFebruary, 2006 domestic stock feed industry will see that country emerge over the next two or three years as a significant importer... Gulargambone Grains Research Update 15 thFebruary, 2006 taken in strips that are not limited for nitrogen which are then compared against the rest of the paddock which has been grown under a lower nitrogen environment...
Related categories:
Catalogue: GRDC Updates (North)
NITROGEN - CATCHING MORE DOLLARS PER UNIT.. Gulargambone Grains Research Update 15 thFebruary, 2006 domestic stock feed industry will see that country emerge over the next two or three years as a significant importer... Gulargambone Grains Research Update 15 thFebruary, 2006 taken in strips that are not limited for nitrogen which are then compared against the rest of the paddock which has been grown under a lower nitrogen environment...
Related categories:
Catalogue: GRDC Media
Saturating winter rain across parts of southern and central NSW have left some crops waterlogged and growers questioning how to approach nitrogen (N) management over the coming weeks... The challenge facing growers is to determine whether N should be applied to water-affected crops and if so, how much and when... Incitec Pivot Limited (IPL) technical agronomist Jim Laycock said N applications should only be considered in paddocks where water is laying when that water is receding and soil has begun to dry out...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Many natural waters contain impurities that make them directly harmful to crops... Knowledge of a water supply's quality, assessed by chemical analysis, is essential in determining its usefulness in an irrigation system... When irrigation water containing residual alkalinity is used on clay soils containing exchangeable calcium and magnesium, sodium from the residual alkalinity in the water will replace calcium and magnesium in the soil...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Many natural waters contain impurities that make them directly harmful to crops... Knowledge of a water supply's quality, assessed by chemical analysis, is essential in determining its usefulness in an irrigation system... When irrigation water containing residual alkalinity is used on clay soils containing exchangeable calcium and magnesium, sodium from the residual alkalinity in the water will replace calcium and magnesium in the soil...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Many natural waters contain impurities that make them directly harmful to crops... Knowledge of a water supply's quality, assessed by chemical analysis, is essential in determining its usefulness in an irrigation system... When irrigation water containing residual alkalinity is used on clay soils containing exchangeable calcium and magnesium, sodium from the residual alkalinity in the water will replace calcium and magnesium in the soil...
Related categories:
Catalogue: Ground Cover
New research from The Australian Centre for Necrotrophic Fungal Pathogens suggests there may need to be a re-think about the relationship between some diseases and crop nutrition... Necrotrophic fungal pathogens infect plant cells and kill them leaving lesions and dead spots; these include Stagonospora nodorum , more commonly known as Septoria nodorum blotch... Biotrophic fungal pathogens, examples of which include rusts and mildews, infect the plant and produce pustules without killing the infected cells...
Related categories:
Catalogue: GRDC Final Reports
The variability of ammonia volatilisation (5-26% of applied urea nitrogen (N)) associated with initial moisture status and the occurrence of follow-up rain leads to the conclusion that sophisticated modelling of this process is unlikely to be practical for accounting purposes... Large nitric oxide emissions are linked to rising nitrate concentrations in soil... While small emissions of nitric oxide occur during periods of near-constant soil nitrate concentration, large nitric oxide emissions are linked to rising nitrate concentrations in soil...
Related categories:
Catalogue: GRDC Factsheets
Soil nitrate can be lost through denitrification, a process that can occur when soils are approaching saturation and become depleted in oxygen... Loss of soil nitrate via denitrification is usually minimal, unless soils are waterlogged... Denitrification, a naturally occurring process, happens when bacteria convert soil nitrate into nitrogen (N) gases that are lost from the soil...
Related categories:

Pages