Abstract
Patterns of annual height and radial growth over a 50- to 60-year period are discussed for three 16- to 18-m-tall sugar maple (Acersaccharum Marsh.) of intermediate crown position growing in tolerant hardwood forest in central Ontario. Two of the trees had been released when they were about 6 m tall. Changes in the growth layer profile as the trees developed showed similarities to those reported for conifers but were modified by light conditions and crown characteristics. A repetitive pattern of changes in height and radial increment in response to changing environmental conditions occurred. Overall changes in the pattern of ring width at breast height appeared to be a good indicator of growth performance as they were close to those for specific volume increment.
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