Journal: Australian Journal of Soil Research

Abbreviation

Aust. J. Soil Res.

Publisher

CSIRO Publishing

Journal Volumes

ISSN

0004-9573

Description

Filters

2006 - 20074
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Publications 1 - 4 of 4
  • Influence of long-term irrigation on the distribution and availability of soil phosphorus under permanent pasture
    Item type: Journal Article
    Condron, L. M.; Sinaj, S.; McDowell, R. W.; et al. (2006)
    Australian Journal of Soil Research
  • Pyrophosphate and orthophosphate addition to soils
    Item type: Journal Article
    McBeath, T. M.; Lombi, E.; McLaughlin, M. J.; et al. (2007)
    Australian Journal of Soil Research
  • Impact of agricultural inputs on soil organisms
    Item type: Journal Article
    Bünemann, Else K.; Schwenke, G. D.; Van Zwieten, L. (2006)
    Australian Journal of Soil Research
  • Long-term effects of crop rotation, stubble management and tillage on soil phosphorus dynamics
    Item type: Journal Article
    Bünemann, Else K.; Heenan, Damian P.; Marschner, Petra; et al. (2006)
    Australian Journal of Soil Research
    The effects of various management practices on soil phosphorus (P) dynamics were investigated in a field experiment in New South Wales, Australia, during 24 years of different crop rotation, stubble management, and tillage treatments. Topsoil samples collected at the beginning of the trial and after 6, 12, 18, and 24 years were analysed for resin-extractable P, inorganic and organic P, and total P. According to the calculated P input–output budget, 9–14 of the 20 kg P/ha added as superphosphate annually remained in the system, depending on the treatment. The measured increase in total P in 0–0.20 m did not differ between treatments, showing an accumulation rate of only 9 ± 2 kg P/ha.year. These results suggest a loss of 4 ± 2 kg P/ha.year, presumably into lower soil layers. Resin-extractable P at 0–0.10 m increased by 1.7 kg P/ha.year, irrespective of the treatment. The increase in total P after 24 years was almost completely accounted for by the increase in total extractable inorganic P. Changes in organic P paralleled changes in organic carbon, with a significant loss in treatments with stubble burning (wheat–lupin rotation and continuous wheat), and a significant accumulation in a wheat–subterranean clover rotation with stubble retention and direct drilling. We conclude that on the time scale of this experiment, the dynamics of carbon and organic P are closely linked.
Publications 1 - 4 of 4