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The Need to Update the Purity Tolerances in the AOSA Rules The purity tolerances adopted by AOSA in 1960 were based on criteria published in Miles, 1960. The Report of the Sampling and Tolerance Committee (Clark, 1960) mentioned that research in the area of sampling and tolerances would continue and that information on expected variations in seed testing other than that provided by the AOSA Rules were to be published in an AOSA Handbook on Tolerances. The research for the tolerance tables was done in cooperation with ISTA and ultimately it was ISTA that published the Handbook on Tolerances (Miles, 1963). It is also important to note that the Preface to the ISTA Handbook of Tolerances and Measures of Precision for Seed Testing (Miles, 1963, p. 525-527) discusses the cooperative work of AOSA and ISTA in the production of the Handbook and that AOSA played a heavy contributing role in development of the tolerances contained within. The articles written by Miles in 1958, 1960 and 1963 demonstrate a stepwise progression in the sophistication and refinement of the tolerance tables ultimately produced. The current regular purity tolerances in the AOSA Rules were based on the information from Miles, 1960. However, for whatever the reason, AOSA failed to adopt the final version published by Miles in 1963. Unfortunately, the recordation of committee reports, rules proposals, and meeting proceedings at that time does not reveal the reasons for this failure of follow-through.
View/download the
complete article published in the February 2005 Seed
Technologist Newsletter Please note: A revised proposal will be submitted to the AOSA Rules Committee by October 1, 2005. If the proposal is accepted by the committee it will be published in the February 2006 Seed Technologist Newsletter.
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