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Filtering by: Creator Omi, Steven Katsu Degree Field Forest Science

Effects of fall lifting and long-term freezer storage on ponderosa pine seedling physiology and quality

Creator:

Omi, Steven Katsu

Abstract:

Two-year-old ponderosa pine (Pinus ponderosa Dougl. ex Laws.) seedlings from two Oregon seed sources were lifted three times in the fall, stored below freezing (-1.5°C), and compared to seedlings that were handled conventionally (spring lifting followed by short-term cold storage, 2-4°C). Based on patterns of budbreak in a greenhouse and...

Resource Type:

Dissertation
Seed set and the proportion of progeny due to self-fertilization in a Douglas-fir seed orchard

Creator:

Omi, Steven Katsu

Abstract:

The effects of clonal variability, crown position of cones, and top-pruning of ramets to reduce height growth, on 1) the proportion of viable self-fertilized progeny (s) and 2) the proportion of filled seeds (PF), were investigated in a 20 year-old Douglas-fir (Pseudotsuga menziesii [Mirb.1 Franco) seed orchard. Cones were collected...

Resource Type:

Masters Thesis