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Home > Research > Monitoring > Forest Soils (FSCC) > Interlaboratory comparisons |
A frequently faced problem in trans-national monitoring programmes is finding a balance between international reference methods improving spatial comparability, and national analysis methods that favour temporal comparability by their use and testing over many years. In function of pan-European forest soil monitoring, FSCC developed the ‘Manual for sampling and analysis of soils’, which provides ISO-based reference methods for all analysis. To obtain a view on the performance of the laboratories within the ICP-Forest Programme and within the BioSoil project, FSCC organises interlaboratory comparisons every two years. Laboratories are judged on the basis of two statistics; Mandel's k (the within laboratory variance) and Mandel's h (the between laboratory variance). Next to the evaluation of the performance of the laboratories, the ring test searches for possible sources of variance, based on the information of the questionnaires. The ring tests reveal that the variation between laboratories is large, and define the need for continuous follow-up and improvement.
6th FSCC Interlaboratory Comparsion 2009The report is available now.
3rd FSCC Interlaboratory Comparsion (2002-2003)  Report ‘Quality assurance & Quality control in Forest Soil Analysis – 3rd FSCC Interlaboratory Comparison’ (674 kb) Annexes ‘Quality assurance & Quality control in Forest Soil Analysis – 3rd FSCC Interlaboratory Comparison’ (3 mb) Poster presented at the World Forestry Congress in Québec, 21 - 28 September 2003 (159 kb)4th FSCC Interlaboratory Comparsion (2005-2006)  Report of the 4th FSCC Interlaboratory Comparison (1.6 Mb) Annexes Report of the 4th FSCC Interlaboratory Comparison (7.8 Mb)5th FSCC Interlaboratory Comparison (2007-2008) Report of the 5th FSCC Interlaboratory Comparison (1,7 Mb) Annexes 1 - 4 (151 kb) Annex 5: Group 0: Soil moisture content (351 kb) Annex 5: Group 1: Particle size distribution (600 kb) Annex 5: Group 2: Soil reaction (554 kb) Annex 5: Group 2: Soil reaction - rounded (506 kb) Annex 5: Group 3: CaCO3 (204 kb) Annex 5: Group 4: OC (356 kb) Annex 5: Group 5: Total N (349 kb) Annex 5: Group 6: Acid exchangeable cations (979 kb) Annex 5: Group 6: Basic exchangeable cations (814 kb) Annex 5: Group 7: Aqua regia extractable elements: P, Ca, K, Mg and Mn (1.085 Mb) Annex 5: Group 7: Aqua regia extractable elements: Cu, Pb, Cd, Cr (1.054 Mb) Annex 5: Group 7: Aqua regia extractable elements: Al, Fe, Cr, Ni, S, Hg and Na (1.349 kb) Annex 5: Group 8: Total elements (1.054 Mb) Annex 5: Group 9: Oxalate extractable Fe and Al (490 kb)Nathalie Cools Last update 27/05/10 |
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