Fig. 1

Comparison of field measured volumes with 95% confidence intervals based on the full 83 samples and the mean and range of \( \overline{\mathit{\mathsf{VOL}}} \) (with 10% bias added) for the 100 replicates by five sample selection methods and four plot types. (Selection method and plot type acronyms are as defined in Table 2; ave.\( \overline{\mathit{\mathsf{VOL}}} \) = mean of the 100\( \overline{\mathit{\mathsf{VOL}}}\mathit{\mathsf{s}} \), \( \overline{\mathit{\mathsf{GTV}}} \) = mean of uncorrected EFI volume with 10% bias, \( \overline{\mathit{\mathsf{Field}}.\mathit{\mathsf{VOL}}} \) = mean of field measured volume