Loss‐on‐ignition and carbon content in a beech forest soil profile

Abstract

The use of loss‐on‐ignition (LOI) and carbon content (C‐content) in estimating soil organic matter is examined. To evaluate the assumptions behind the use of these methods, the conversion factor (LOI/C‐content) is examined as a function of depth and spatial variability.Due to increasing variability with depth no general relationship between LOI and C‐content can be established for horizons below 60 cm. For horizons above 60 cm it is demonstrated, that more than one conversion factor is needed.The application of a regression equation to correct for inorganic losses is shown to be problematical. This is due to the variability in inorganic losses and the varying C‐content of the organic matter.