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deep soil testing

Catalogue: Broadacre Field Crops DAFF QLD
A crop field showing nitrogen deficiency.. The books outline the range of tools that are available to assist growers to manage nitrogen and climate risk for maximum yields and to address soil fertility decline... The amount of nitrogen added will be in proportion to the quantity of vegetative material returned to the soil which in turn is influenced by the seasonal conditions...
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Catalogue: Broadacre Field Crops DAFF QLD
A crop field showing nitrogen deficiency.. The books outline the range of tools that are available to assist growers to manage nitrogen and climate risk for maximum yields and to address soil fertility decline... The amount of nitrogen added will be in proportion to the quantity of vegetative material returned to the soil which in turn is influenced by the seasonal conditions...
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Catalogue: Broadacre Field Crops DAFF QLD
A crop field showing nitrogen deficiency.. The books outline the range of tools that are available to assist growers to manage nitrogen and climate risk for maximum yields and to address soil fertility decline... The amount of nitrogen added will be in proportion to the quantity of vegetative material returned to the soil which in turn is influenced by the seasonal conditions...
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Catalogue: GRDC Updates
Getting nutrition right in 2011 after a big year in 2010.. It is important that water soluble phosphorus is placed in the seed furrow or as close as possible to the seed furrow to allow access for developing root systems... The fertiliser concentrations in the seed zone are greatly influenced by the amount of soil disturbance, air velocity, ground speed, seeding depth, stubble cover, soil texture and moisture content during the seeding operation and its interaction with the concentration of fertiliser delivered to each seed-row...
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Catalogue: Ground Cover
Deep soil testing to 40 centimetres or below across Western Australia's agricultural regions has revealed there is more nitrogen in the subsoil that can be accessed by crops than previously realised... Testing to the depths provides detailed mineral nitrogen (ammonium plus nitrate) profiles through subsoil layers and can help diagnose any potential crop production constraints, such as an acid band, compaction or hardpan... Where there were no root constraints in the subsoil, deep mineral nitrogen found at 100cm to 120cm was up to 60 per cent as effective as the same amount of nitrogen in 0 to 20cm and Dr Oliver says it should be accounted for in fertiliser decisions in these situations...
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