Poeplau, Christopher
- Department of Ecology, Swedish University of Agricultural Sciences
Research article2015Peer reviewed
Estimating residual water content in air-dried soil from organic carbon and clay content
Poeplau, Christopher; Eriksson, Jan; Kätterer, Thomas
Abstract
Measurement of soil organic carbon (SOC) or other elements in air-dried soil samples leads to underestimation of mass fraction per unit dry soil (concentration) unless the residual water (RW) content is accounted for. However, RW measurements are time-consuming and costly and thus often neglected. The resulting bias can lead to dramatic erroneous results, especially when two differently treated datasets are compared. We therefore, derived pedotransfer functions to estimate residual water content in air-dried soil samples from: (i) SOC content, (ii) clay content and (iii) both variables together. The uncertainty of prediction decreased in the order (i)-(iii), with root mean squared deviation (RMSD) values of 0.64, 0.46 and 0.34% of RW content, respectively. These functions represent a potential step towards more harmonized and transparent SOC determination. (C) 2014 Elsevier B.V. All rights reserved.
Keywords
Residual water; Soil carbon; Pedotransfer function; Cost effective
Published in
Soil and Tillage Research
2015, volume: 145, pages: 181-183
Publisher: ELSEVIER SCIENCE BV
SLU Authors
Eriksson, Jan
- Department of Soil and Environment, Swedish University of Agricultural Sciences
- Department of Soil and Environment, Swedish University of Agricultural Sciences
Kätterer, Thomas
- Department of Ecology, Swedish University of Agricultural Sciences
- Department of Ecology, Swedish University of Agricultural Sciences
UKÄ Subject classification
Soil Science
Publication identifier
- DOI: https://doi.org/10.1016/j.still.2014.09.021
Permanent link to this page (URI)
https://res.slu.se/id/publ/63603