Stratification, Germination and Early Development of Engelmann Spruce on Various Substrates
Since the beginning of silvicultural research, no problem has received attention longer, nor so frequently, as the natural reproduction of our fir and spruce forests. Yet, there are still many questions to be answered. The purpose of this study was to investigate some of these questions, particularly questions concerned with the reproduction of Engelmann spruce (Picea engelmanni, Engelm.), and to indicate ways for their solution. The entire study was confined to laboratory and greenhouse, and any application of the results to actual field observations should be undertaken with caution. Nevetheless, it suggests some questions for field studies and aids in their solution by providing references of literature and giving data for the design of such experiments.
Glatzel, Garhard (1964). Stratification, germination and early development of engelmann spruce on various substrates. MS. 60p.