Height–Diameter Equations for Eight Midwestern Rainforest Species in Nigeria, Using Monserud’s Model

Height-diameter equations are frequently employed in predicting the mean total height for trees in the absence of all other growth variables except diameter at breast height (dbh). Diameter at breast height is one of the easily measured variables with less measurement error when compared to tree height. This study presents a set of height-diameter equations for 8 Midwestern Rainforest species in Nigeria using Mansard’s method. Mansard’s nonlinear regression techniques were used to develop the equations; and these provided a logical means of predicting unknown tree heights from known DBH for the 8 Midwestern Rainforest species in Nigeria. The resulting equations revealed plausible regression coefficients of the prediction models with coefficient of determination (R2)values ranging between 0.749 – 0.934; which indicate the strong relationship of height and diameter for sustainable prediction of tree height when only diameter measurement is available