On the measurement of air permeability.

Authors

  • P.H. Groenevelt
  • G.G. Lemoine

DOI:

https://doi.org/10.18174/njas.v35i3.16733

Abstract

Air pemeability values are used to assess the state of aeration, soil structural stability, structural degradation and compaction. A simple experimental procedure, using a constant-speed motor, a syringe and simple pressure sensors, is discussed. At steady-state air flow throught a soil sample the air permeability coefficient can be derived directly from Kirkham's equation. For transient conditions an equation is presented, based on a combination of Kirkham's equation and the ideal gas law, from which the air permeability coefficient can be deduced by trial and error. The importance of the soil water potential, in relation to the measurement of air permeability, is discussed. Complications arising from the 'non-ideal' behaviour of the pressure sensor are also discussed. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Published

1987-08-01

Issue

Vol. 35 No. 3 (1987)

Section

Papers

License

© Copyright KLV All rights reserved. The copyright covers the exclusive right to reproduce and distribute the contribution, including reprints, translations, photographic reproductions, microform, electronic form (offline, online), or any other reproductions of similar nature. The Author may publish his/her contribution on his/her personal Web page provided that he/she creates a link to http://library.wur.nl/ojs/index.php/njas and that together with this electronic version it is clearly pointed out, by prominently adding "© KLV", that the copyright for this contribution is held by KLV. The full-text version may be available from the Author's Web page only after a delay of 12 months following the publication of the paper, whereas such a delay is not required for the abstract.