This analysis shows how individual-tree data affects growth estimates, suggesting a balanced approach to sampling.
Growth estimates based on remeasured plots are recognized as the best available. But is it desirable to keep separate records for each tree on every plot? Although use of individual-tree data were found to reduce the sampling error, gathering the data increased costs by about 30 percent. The best solution seems to be a compromise: take individual-tree data from a sample of trees on the sample plots.
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C. Allen Bickford (1954) studied this question.
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