The average number of pollen grains per pollen sac was 821, and pollen sac per male strobilus was 111. It was estimated that a male strobilus produced about 9.11×104 pollen grains. Estimates of the number of pollen grains produced from each tree and from the seed orchard were obtained on the basis of the number of male strobili per tree and pollen grains per male strobilus.
