Estimating potential Engelmann spruce seed production on the Fraser Experimental Forest, Colorado

Robert R. Alexander; Carleton B. Edminster; Ross K. Watkins

doi:10.2737/RM-RP-269

Treesearch

Estimating potential Engelmann spruce seed production on the Fraser Experimental Forest, Colorado

Informally Refereed

Authors:

Robert R. Alexander, Carleton B. Edminster, Ross K. Watkins

Year:

1986

Type:

Research Paper

Station:

Rocky Mountain Research Station

DOI:

https://doi.org/10.2737/RM-RP-269

Source:

Res. Pap. RM-RP-269. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 7 p.

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Download (PDF 1.35 MB): https://research.fs.usda.gov/download/treesearch/53278.pdf

Abstract

Two good, three heavy, and two bumper spruce seed crops were produced during a 15-year period. There was considerable variability in seed crops, however. Not all locations produced good to bumper seed crops when overall yearly ratings averaged good or better; conversely, some locations produced bumper seed crops in 3 or more years. Mathematical relationships, that should be useful in estimating potential sound seed production, were estimated between periodic annual15-year sound seed production and (1) periodic annual15-year total seed production and (2) selected stand parameters of dominant and co-dominant spruces.

Keywords

Picea engelmannii, seed production, natural regeneration

Citation

Alexander, Robert R.; Edminster, Carleton B.; Watkins, Ross K. 1986. Estimating potential Engelmann spruce seed production on the Fraser Experimental Forest, Colorado. Res. Pap. RM-RP-269. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 7 p.