Full TGIF Record # 4614
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Author(s):Tattersfield, J. G.
Author Affiliation:Min. of Agric. and Fisheries, Wellington, New Zealand
Title:Assessment of results of referee tests on germination
Source:Seed Science and Technology. Vol. 7, No. 2, 1979, p. 247-257.
Keywords:TIC Keywords: Seed germination; Analysis; Lolium perenne
Abstract/Contents:A description is given of an improved method of analysis for results from the referee germination tests which the International Seed Testing Association regularly conducts among its member stations. Analysis was needed to determine which stations deviate significantly from the majority in their results. The important features of a proposed new method are: it uses the observed results to estimate the variance in any test rather than a fixed tolerance table which may not be suitable for the spp.; it uses the results in the better quality half of the distribution only, to determine which results should be excluded from the estimation of the mean and variance of the true distribution. All results are then re-tested against this distribution; all deviations are converted to normal scores which can then be added over several tests to give an indication of a station's overall performance on the sp.; it indicates whether any sample has caused special problems for stations in achieving uniformity, and also shows if the results for any sp. are so variable that further research is needed in the techniques of testing. Examples are given from test series each of 3 samples of perennial ryegrass and maize.
Note:Summary appears in French and German
Geographic Terms:New Zealand
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tattersfield, J. G. 1979. Assessment of results of referee tests on germination. Seed Sci. Technol. 7(2):p. 247-257.
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MSU catalog number: SB 114 .A1 S4
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