Analysis reveals that growth rates vary from 7.7% for cottonwood to 0.8% for lodgepole pine, highlighting differences among species.
Growth per cent was computed for 17 American species for the age at which mean annual growth in board feet culminated. The rates of growth at this age ranged from 7.7 per cent for cottonwood in the Mississippi Valley to 0.8 per cent for lodgepole pine in the Rocky Mountains.
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Helen Morey (1932) studied this question.
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