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Soil Science Society of America Journal Abstract -

A Technique to Index Soil Pores and Aggregates Larger than 20 Micrometers1,2


This article in SSSAJ

  1. Vol. 41 No. 1, p. 139-140
    Received: May 5, 1975
    Accepted: Aug 31, 1976

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  1. D. E. Wilkins,
  2. W. F. Buchele and
  3. W. G. Lovely3



A laboratory technique was developed to measure soil pore size, soil aggregate size, and orientation of soil pores and soil aggregates. The technique consisted of fixing soil samples with a fluorescent polyester resin, sectioning the soil samples, and taking a photograph under black light. The black light provides sharp contrast between pores and soil aggregates. The photographs were scanned with a Flying Spot Particle Analyzer (FSPA). From the FSPA scanning information, means, and variances of soil aggregate size, soil pore size, and apparent soil porosity were calculated. This technique is limited to nonswelling soils with pore and aggregate intercepts > 20 µm.

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