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plant uptake

Catalogue: GRDC YouTube channel
P is transported to the root surface by diffusion... P supply by diffusion is determined by: the effective P diffusion coefficient (soil dependent), the P concentration gradient from the soil solution to the root surface (depends on soil solution P concentration and root uptake characteristics), root surface area (bigger root zone volume, more P uptake)... Technology to reduce spray drift GCTV: Drift Reducing Technology..
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Catalogue: GRDC Updates
Williams and Lipsett (1961) found that 50-60 years of wheat cultivation in NSW resulted in a loss of 30% of organic C but only 17% organic P. In natural soils the extent of net immobilization of P in organic matter and probably soil organic matter levels may often be set by the P supply in the parent material... Many authors only consider supply to occur by mass flow and diffusion (the interception component in Table 2.2 is combined with the diffusion component)... Plants can access a greater volume of soil through the formation of a mycorrhizal symbiosis...
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Catalogue: GRDC Updates
Plot of cumulative crop P uptake against Colwell-P for 15 soils used in the glasshouse depletion experiment... Plot of relative yield against Colwell-P for 15 soils used in the glasshouse depletion experiment... The results in Fig. 2 indicate that the BSES-P (440 mg P/kg) in Soil 9 is not as available as the BSES-P in Soil 8 or Soil 3 (382 mg P/kg and 91 mg P/kg respectively)...
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