Supplementary information
From the following article:
Carbon losses from all soils across England and Wales 1978–2003
Pat H. Bellamy, Peter J. Loveland, R. Ian Bradley, R. Murray Lark & Guy J. D. Kirk
Nature 437, 245-248(8 September 2005)
doi:10.1038/nature04038
Supplementary Figure S1
Variability of soil carbon content measured at 0, 10 and 50m from ten target sites, confirming that the accuracy with which sites could be relocated was adequate.
Supplementary Figure S2
Comparison of Corg values measured by ion loss on ignition and by the modified Walkley-Black method for 95 souls with Corg = 20-200g kg-1, confirming that the change of method for high carbon soils introduced no artefacts.
Supplementary Figure S3
Comparison of Corg values obtained in 2004 on archived soils from the original sampling with the values obtained at the time of the original sampling, confirming that there were no significant differences in analytical precision between the samplings. This file was corrected on 24 August 2007.
Supplementary Table S1
Characteristics of the sites used to study the accuracy of relocation and local variation of soil carbon.
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