Abstract
An augmented experimental design is any standard experimental design to which additional treatments (new treatments) have been added to those (standard treatments) appearing in the standard experimental design. The additional treatments require enlargement of the complete block, the incomplete block, row, column, etc. The groupings in an augmented design may be of unequal size. The construction and randomization procedures, and the general method of analysis have been given for all augmented experimental designs with one-way elimination of heterogeneity from the experimental area. The general results are illustrated algebraically and arithmetically with two examples, the augmented randomized complete block design and the augmented balanced lattice design.

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