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Catalogue: GRDC Updates
Many soils may already have lost much of this extra, slow release P reserve... Soil testing for available P status commonly involves a Colwell test on the 0-10 cm layer... The paper summarises some recent work that attempts to quantify the differences in availability of sparingly soluble P sources as affected by soil acidification...
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Catalogue: GRDC Updates
As an example, where appropriate use of fertilisers can increase productivity beyond that currently being attained, adjusting the amount or timing of fertiliser application would result in greater carbon inputs to the soil... Recent research results have also noted that the proportion of residue carbon that is retained in a soil to enhance soil carbon stocks can be enhanced by ensuring that enough nutrients exist in the soil to both satisfy the crop requirements and the requirements to build soil organic carbon... If we use the same bulk density as above (1.2 g/cm3) and restrict our calculations to the top 10 cm of soil where organic carbon is most easily increased, at 2% carbon the soil would contain 24 tonnes C/ha...
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Catalogue: GRDC Final Reports
Improving compacted soils in the eastern wheatbelt.. The pore spaces between soil aggregates are enlarged and can hold and conduct more water increasing the ability of the soil to store and supply water... A combination of deeper ripping and closer tine spacing can give larger yield increases...
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