Bitterlich method

angle-count method

angle-gauge method

variable-radius method

prism-count method

angle-gage method

Calculating quadratic mean diameter, a conventional measure of the average tree diameter in a stand, requires estimates of the stand's basal area per acre and trees per acre.

GROWTH – Increase in diameter, basal area, height, and volume of individual trees or stands during a given period of time.

The highest densities (25.2 individuals/ha), basal areas (1.6 m2/ha) and average heights (6.9 m) were in the protected forest sectors.

The basal area per plot of five years ago is calculated on the basis of the estimated diameter under bark of five years ago of all the trees in the plot.

This corresponds to approximately 5% dead standing trees (or a basal area of over 1.6 m2 of dead standing trees per hectare or a volume over 18 m3 snags per hectare).

If a thinning has taken place in the five-year period between the two years of determination of diameter, basal area per plot and volume per plot, this will be indicated (Yes = 1, No = 0).

These trees, by number and distribution, or by average dbh, basal area, or volume, are such that at rotation age they will produce a timber stand of the maximum merchantable timber yield.

The most efficient way to assess a forest is to have solid information on each individual compartment – information such as the dominant species type, the basal area, and the average diameter, length or age of the trees.

The most efficient way to assess a forest is to have solid information on each individual compartment – information such as the dominant species type, the basal area, and the average diameter, length or age of the trees.