Summary
Statistical analyses of the results of an inter-laboratory trial on the chemical analysis of the same leaf materials have revealed significant differences between the laboratories and within the same laboratories in the case of duplicate samples analysed at the same or different times. Ranking of laboratories according to the deviation of the results from mean values suggests real differences in the consistency of the methods used.
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Literature
Müller, W., Zur Bewertung analytischer Methoden auf dem Gebiet der Blattanalyse. Beiträge Forstwirtsch.8, 97–100 (1974).
Additional information
The first author was head of the Statistical Section of the Forest Research Station ‘De Dorschkamp’ at Wageningen, Holland at the time of his research; the second author is senior silviculturist at the same institute and leader of the working party S1.02–3 of IUFRO (International Union of Forest Research Organizations).
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La Bastide, J.G.A., Van Goor, C.P. Interlaboratory variability in the chemical analysis of leaf samples. Plant Soil 49, 1–7 (1978). https://doi.org/10.1007/BF02149903
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DOI: https://doi.org/10.1007/BF02149903