Loss-on-ignition and the carbon contents of Australian soils

Abstract

Regression relationships between high temperature loss-on-ignition and organic carbon values are presented for data from a range of Australian soils. Inclusion of the clay content markedly improves the proportion of variance explained by the regressions. It is shown that soils differ in their regressions of organic carbon on loss-on-ignition. Loss-on-ignition is concluded to be a useful index of soil organic matter status closely related to organic carbon levels.