CO4.1 General
general - root collar diameter - cell grown trees - seedlings and transplants (open) - seedlings and transplants (container) - girth
Root collar diameters may be given in specifications of conifers, especially seedlings and transplants used in forestry planting, since they assist in quantifying the 'substance' of the plant.
Girth measures are seldom used, but are a useful measure especially for Pinus spp. which can be grown to Semi Mature size with a clear stem.