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The Design of Animal Husbandry Experiments¹

Macdonald College

Abstract

The past quarter of a century has seen many changes and refinements in the technique of Animal Husbandry experimentation. Most of these changes have accompanied or followed the gradual increase in the use of statistical methods in the interpretation of the data. This was indeed a logical development, for if the problems are statistical in nature, their solution should be facilitated by employing statistical methods. In the early stages of this development the majority of refinements introduced were aimed at reducing the variability between individuals within experimental groups. Not all of the procedures advocated were effective, but the experimenter was evidently becoming increasingly aware that because animals on the same treatment behaved differently, there was an uncertainty about the cause and significance of differences in behavior between animals in contrasted experimental lots.

¹ Contribution from the Faculty of Agriculture, McGill University, Macdonald College, Quebec, Canada. Journal Series No. 167.

² Professor of Animal Nutrition.

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