Title

Addendum to counting by weighing and the seed testing problem

Authors

Authors

D. M. Nickerson

Comments

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Abbreviated Journal Title

Ann. Appl. Biol.

Keywords

sampling; estimation; Agriculture, Multidisciplinary

Abstract

The subject of counting by weighing as addressed in Ridout & Suntheralingam (1997) is revisited. When the coefficient of variation of the seed weights is known, we show how to modify the seed testing procedure in the aforementioned paper to account for the uncertainty introduced by obtaining a given number of seeds by weight, rather than exact counting. We find that counting by weighing requires a greater number of seeds per sub-sample than that required by the exact counting method of Ridout & Roberts (1997). Furthermore, the number of seeds per sub-sample increases with decreasing initial sample size used to estimate mean seed weight.

Journal Title

Annals of Applied Biology

Volume

143

Issue/Number

3

Publication Date

1-1-2003

Document Type

Article

Language

English

First Page

371

Last Page

374

WOS Identifier

WOS:000186901200014

ISSN

0003-4746

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