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A best protocol for acid sulphate soil detection, Ashfield

Loos, C., Scott, B. and Taplin, R. (2004) A best protocol for acid sulphate soil detection, Ashfield. In: Iron & Sulphur Bacteria Workshop, 11 - 14 February, Murdoch University, Perth, Australia

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An early analysis of data for Acid Sulphate Soil ASS detection uses field based measurements of pH and laboratory based measurements of Cl/SO4 and SPOCAS at Ashfield, Western Australia. Statistically, no test is outstanding and the tests are not necessarily the same. Field pH testing is inexpensive and worth doing but statisti¬cally Field pH and Cl/SO4 are insignificantly related (P = 0.045) Fisherʼs Exact Test. Cl/SO4 testing rarely gives a negative result. When the Field pH gives a negative result, Cl/SO4 is unlikely to confirm it. Field pH and SPOCAS are significantly re¬lated (P = 0.022, Fisherʼs Exact Test); large numbers of positive and negative results lend power to this statement. It is particularly concerning that when the Field pH and Cl/SO4 agree, the SPOCAS only gives a positive result 68% of the time, a figure not statistically different to 50%. The follow-up suggests numerical readjustments of the cutoff for the tests and the protocol for ASS in Western Australia, in the shape of a decision tree.

Item Type: Conference Paper
Murdoch Affiliation(s): School of Biological Sciences and Biotechnology
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