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Filtering by: Subject Douglas fir -- Effect of drought on Subject Plants, Effect of light on

Light in relation to the growth of Douglas fir

Creator:

Hawkins, Leroy A.

Resource Type:

Undergraduate Thesis

Full Text:

an effect on the height of Douglas fir, and the effect is to make the trees of the denser stand grow
Effect of light quality and periodicity upon germination of Douglas-fir seed (Pseudotsuga menziesii (Mirb.) Franco) and on growth of Douglas-fir seedlings

Creator:

Johnson, Le Roy Curtis

Abstract:

A study on the effects of light quality and periodicity on the germination of Douglas-fir seed and the growth of Douglas-fir seedlings was conducted. Interest was focused on responses that could be measured and observed without biochemical assay. It was found that .Douglas-fir seed,s would respond to red-light treatments by...

Resource Type:

Masters Thesis

Full Text:

UPON GERMINATION OF DOUGLAS-FIR SEED (PSEUDOTSUGA MENZIESII (MIRB.) FRANCO) AND ON GROWTH OF DOUGLAS
The effect of light intensity on Douglas-fir foliage quality : survival and development of Western spruce budworm

Creator:

Waddell, Karen L.

Abstract:

Foliage from Douglas-fir(var. glauca) seedlings grown under two light intensities was bioassayed to examine palatability to the western spruce budworm (Choristoneura occidentalis Free.). Samples were collected in Fall, Winter and early Spring to identify seasonal changes in host foliage, as evidenced by the response of spruce budworms. Fall collected foliage...

Resource Type:

Masters Thesis