Mean crown heights taken in this fashion on M1 remain at about 43 47 mm until quite an advanced stage of wear [9: Table IV].
Measurements of mean crown heights taken by CPG in skulls of southern white rhinos varied in both M1 and M2 from 45 to 72 (n = 4 for both teeth), and in northern skulls the range was 35 52 (n = 10 M1, n = 7 M2).
The vertical lines represent relative distance from tip of tree to mean green crown height at age 29 years (crown), and to mean height at time of thinning (thinning).
For the PSPs with a post-thinning stand density of 250 stems ha−1, approximately half the branches measured were above the mean green crown height (Fig. 2).
For the PSPs with post-thinning stand densities of 500 and 750 stems ha−1, the majority of the measured branches were below the mean green crown height (Fig. 2), so branch diameter growth would have been negligible.
This research demonstrates that strong relationships can be developed for mean top height, green crown height, volume, mean diameter and basal area from LiDAR and stand metrics.
Mean top height, green crown height, volume, mean diameter, basal area, and stand density, respectively, ranged, six-fold, 17-fold, 226-fold, six-fold, 73-fold and 12-fold across the plot series (Table 2).
Models were developed using SAS software (SAS Institute Inc. 2008), to estimate mean top height, green crown height, total stem volume, mean diameter, basal area and total stand density.
Values of RMSE for the final models of mean top height, green crown height, stem volume, mean diameter, basal area and stand density were, respectively, 1.02 m, 0.427 m, 20.2 m3 ha-1, 13.9 mm, 3.81 m2 and 355 stems ha-1.
Variables with the greatest contribution (with the partial R2 in brackets) to models of mean top height, green crown height, volume, mean diameter and basal area included the 75th (0.85), 1st (0.76), 10th (0.83), 95th (0.74), and 10th (0.72) LiDAR height percentiles.
