Relationships between live and dead crown weight and d.b.h. (ranging from 0 to 40 inches), tree height, and crown ratio are presented for 11 conifer species in the Rocky Mountains. D.b.h. was highly correlated with crown weight; however, for most species, addition of height, crown length, and especially crown ratio improved precision. Site index and stand density improved precision of estimates slightly for about one-half of the species. Crown ratio accounted for most of the differences in crown weight between dominant and intermediate crown classes. Relationships between bole weights and d.b.h. and height are presented for trees up to 4 inches d.b.h.
United States Department of Agriculture, Forest Service, "Weight and Density of Crowns of Rocky Mountain Conifers" (1978). Forestry. Paper 20.