Compatible Taper Equations for Tectonagrandisplantation in Aramoko Forest Reserve, Ekiti State, Nigeria

Sažetak

The study was carried out to generate compatible stem taper equations for theTectonagrandis(Teak)
plantation in Aramoko Forest Reserve, Ekiti State, Nigeria. The age series used for the study were 15,
17, 20, 23, 26, and 30 years old, and three plots of 20 x 20m were randomly selected from each age
series. The diameter at breast height (dbh) of all trees within each was measured and grouped into 4
classes; 10-20, 20-30, 30-40 and 40-50cm. The tree with the closest dbh to the mean dbh in each
diameter class was selected for felling. The diameter at the ground level (DG), 15 cm (D15), 30 cm (D30)
and 45 cm (D45) were measured before felling while, the stump height (SH) and total length were
measured after felling.Descriptive statistical analysis was used to summarize the data collected. The
taper equations generated for 10-20, 20-30, 30-40 and 40-50 cm;
respectively were assessed using F-ratio, Root Mean
Square of Error (RMSE), Adjusted coefficient of determination (R2adj). Thetaper equations were
satisfactory based on the various criteria used for assessment and validation, and are recommended
for estimating the taper of theteak trees in the plantation.