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Sampling Replicated Field Experiments on Oats for Yield Determinations
Author(s) -
Homeyer Paul G.,
Black C. A.
Publication year - 1947
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1947.036159950011000c0062x
Subject(s) - citation , library science , sampling (signal processing) , yield (engineering) , field (mathematics) , computer science , statistics , sociology , operations research , mathematics , telecommunications , materials science , pure mathematics , metallurgy , detector
I T is not at present feasible to harvest the whole of every oat plot for yield determinations on all replicated field experiments carried annually by the Iowa Agricultural Experiment Station. Instead, the yields are estimated from samples taken in each plot. Since the work of sampling is laborious and must usually be carried out under pressure of time, it is important to know the most efficient methods of sampling. The object of this paper is to give the results of a study in which the relative efficiencies of several al' ternative sampling designs were measured. In addition, estimates are made of the loss in information, from different rates of sampling. The statistical techniques used are not given in this paper but will be included in a subsequent publication which will also contain an evaluation of alternative sampling methods for several crops in addition to oats.