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Filtering by: Creator Garcia, Michael O. Committee Member Evans, H. J. Decade 1960-1969

Snowbrush, Ceanothus velutinus Dougl., its ecology and role in forest regeneration in the Oregon Cascades

Creator:

Zavitkovski, J.

Abstract:

The ecological and silvicultural importance of snowbrush, Ceanothus velutinus, in the areas west of the summit of the Oregon Cascades was studied. Particular attention has been given its nitrogen- fixing ability under both field and greenhouse conditions. On west slopes of the Oregon Cascades snowbrush occurs above 2, 500 feet...

Resource Type:

Dissertation

Full Text:

soil 38 surface (o) and cumulative dry weights of litter fall (x) and of leaves (s). Total nitrogen in
Clay mineralogy and related chemical properties of soils formed on Mazama pumice

Creator:

Chichester, Frederick Wesley

Abstract:

A sequence of soil profiles was sampled along a climate-vegetation transect on the dated Mazama pumice fall in central Oregon. The <2 μ size fraction from each sample was characterized with respect to the relative significance of amorphous and crystalline components, and the individual minerals of the latter group were...

Resource Type:

Dissertation

Full Text:

samples (O. D.weight basis). 73 27 Cation exchange capacity data from procedure verification