Changes in tree height are of prime concern for predicting future stand composition & selecting ideal crops in the pure stands. Height growth proceeds slowly in seedling is well established. This is followed by the rapid growth for 20-30 yrs depending upon the species & sites.

Cumulative growth followed by the growth in ht, dia, volume and basal area as well. Wood production in central stem can be predicted by past rate of increment in dia& ht.

In even aged plantations, height growth on age shows a typically sigmoid pattern with slow early and late stages and fast growth between.

In irregular forest and especially with shade tolerant species, the early rate of height growth may be extremely slow and only accelerated when the tree is released from overhead shade.