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Filtering by: Subject Ash (Plants) -- Identification Decade 1980-1989

Dynamics of size structures : simulation and experiments in seedling stands of Pseudotsuga menziesii and Fraxinus mandshurica

Creator:

Petersen, Terry D.

Abstract:

Computer simulations and experiments were used to determine the basis for skewness and inequality in size structures (frequency distributions of Individual plant sizes) prior to self-thinning mortality. In simulated stands, density-dependent neighborhood heterogeneity caused variability in the growth rate of individuals with the same size, and such variability caused skewness...

Resource Type:

Dissertation
Mt. St. Helens ash : considerations of its fallout on rangelands

Creator:

Sneva, Forrest, Britton, Carlton M., Mayland, H. F., Buckhouse, John, Evans, Raymond A., Young, James A., and Vavra, Martin

Abstract:

Field and laboratory studies were conducted on volcanic ash from Yakima, Moses Lake, Spokane, Washington, and Moscow, Idaho, three weeks after the May 18, 1980, eruption of Mt. St. Helens in southwestern Washington. These studies examined 1) the chemical, physical, and water retentivity properties of the ash, 2) the effect...

Resource Type:

Technical Report

Full Text:

effects of the ash over the long term, both on individual native plants and the native and seeded plant