Cuttings taken from different species, population, and individuals vary in rooting capacity. For example, cutting of Norway spruce are easy to root, while those of red spruce are difficult. There is apparently greater variation in the rooting potential of cuttings taken from different trees of a given population, than of those from several population of the same species. Trees which propagate readily from cutting lend themselves to the development of clones; Girouard, 1972; Karki, 1972;