The designer of an experiment on perennial plants, especially on trees, must take into account several considerations which do not ordinarily concern those whose crops grow and mature in a single season, namely (1) those that affect any initial trial, (2) those that affect any subsequent trial and (3) the desiderata in an initial trial to ensure that it shall be possible to arrange subsequent trials on the same material.
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Hoblyn et al. (1954) studied this question.
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