The phrase "a height class" is correct and usable in written English.
It can be used in contexts related to categorizing or grouping individuals or objects based on their height, such as in educational, scientific, or statistical discussions.
Example: "In our study, we divided the participants into a height class to analyze the effects of height on athletic performance."
Alternatives: "a height category" or "a height group".
The figures represent two structural indices: a height class and b diameter class.
with the allometric parameter θ and the vertical distribution of potential leaf area of a height class h, F L (t,z,h).
Therefore, seedlings may need to escape a "browsing trap" (held in a height class making them more vulnerable to browsers) [57] induced by small- and medium-size herbivores [9], [10], [58], before being able to grow into the sapling phase.
In the framework of this study, F L (t,z,h) is calculated by considering the difference between maximum tree height of a height class and the height of the mean crown base z cb, which is decided as the height after the occurrence of the crown rise due to the performance of dead leaves.
With every observation, data on the height of the focal individual was also collected, and a height class was ascribed to every observation (0, ground; 1, 0 3 m; 2, 3 6 m; 3, 6 9 m; 4, 9 12 m; 5, 12+ m).
The values plotted are least squares means from a treatment × height class interaction term added to Model (5).
Figure 8 Observed and simulated annual changes in tree density of the Larix kaempferi stand from 1982 to 1989. Figure 9 Observed and simulated frequency distributions of Larix kaempferi trees in each height class in (a) 1983, (b) 1985 and (c) 1989.
Replicate was included in the model as a random effect while treatment and height class were treated as fixed effects.
An exponential curve was fitted to depict stand's population structure (girth and height class distributions) and a chi-square test of goodness of fit evaluated the curve fit.
Percentage values grouped in the four height classes were subjected to a two-way ANOVA for each height class and for the total of the four classes.
The smallest fertile colonies (<30 mm height class) were on an average 24.0 mm in height and 3.6 mm in basal diameter: these colonies were on an average between 7 and 10 years.
