<p>This the Concept Scheme of <a href='https://catalogue.nla.gov.au/Record/4854518'>Soil
Chemical Methods Australasia</a> (2011), George E Rayment and David J Lyons. These
comprise the laboratory and field chemical tests relevant to Australasia and beyond.
</p> </p><a href="https://raw.githack.com/ANZSoilData/def-au-scma/master/html/00frontmatter/01Preface%20and%20acknowledgements.html">Preface
and Acknowledgements</a></p>