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plant residue

Catalogue: GRDC Updates
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... In Figure 4 the estimated changes in soil organic carbon content (%) of the 0-10 cm layer that occur with different levels of wheat production (grain yield) are presented... Results indicate that a sustained productivity of about 4 tonnes/ha/year of wheat grain yield is required to maintain the equilibrium soil carbon content at Roseworthy (Figure 4 a)...
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Catalogue: GRDC Factsheets
Effective disease management requires the selection and application of a number strategies to minimise crop losses and maximise sunflower yield and oil quality... Recent research has identified that northern grain-growing soils are capable of suppressing root-lesion nematodes, especially in the top layer (0-15 cm) of soil, and this capacity can be enhanced by increasing the biological activity of that soil, mainly through carbon inputs and minimising soil disturbance... Research is continuing to develop methods of increasing biological activity to enhance suppressiveness deeper in the profile...
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Catalogue: GRDC Factsheets
Effective disease management requires the selection and application of a number strategies to minimise crop losses and maximise sunflower yield and oil quality... Recent research has identified that northern grain-growing soils are capable of suppressing root-lesion nematodes, especially in the top layer (0-15 cm) of soil, and this capacity can be enhanced by increasing the biological activity of that soil, mainly through carbon inputs and minimising soil disturbance... Research is continuing to develop methods of increasing biological activity to enhance suppressiveness deeper in the profile...
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Catalogue: GRDC Updates
Managing invertebrate pests in new farming systems.. There is a continuing need for species-specific research into the ecology of species for which there are currently no effective controls, such as European earwig... The question of pesticide effects is currently being addressed through the GRDC-funded project "Developing and promoting IPM in Australian grains" which is comparing three pest management approaches: (i) "nil" insecticide input (control), (ii) conventional "high" insecticide input, and an alternative "low" insecticide input approach...
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Catalogue: GRDC Final Reports
The char fraction was separated from the <53 um fraction using high-energy ultra violet (UV) photo-oxidation... Figure 3 shows the changes in OC in the three fractions >200 um, 200-53 um and <53 um for the Waite soil with the equivalent of 30 and 0 tC ha -1(a and c) and the Lemnos loam soil (b and d) after the addition of plant residues... A knowledge of the chemistry of the fractions is essential if they are to be used to accurately predict soil properties and behaviour...
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