Black Spruce Cone and Seed Production
Black Spruce Cone and Seed Production

Author: D. A. Skeates

Publisher: Maple : Ontario Tree Improvement and Forest Biomass Institute

Published: 1987

Total Pages: 34

ISBN-13:

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Review of several black spruce cone and seed yield studies conducted by scientists of the Ontario Ministry of Natural Resources and the Canadian Forest Service. Data on yields per tree, yields per hectolitre of cones, and yields per hectare spanning many years of production is listed.

Effects of Thinning and Fertilizing on Production of Western White Pine Seed
Effects of Thinning and Fertilizing on Production of Western White Pine Seed

Author: Burton Verne Barnes

Publisher:

Published: 1969

Total Pages: 22

ISBN-13:

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In a 40-year-old western white pine plantation developed as a seed production area, heavy thinning and application of fertilizer in the fall significantly increased strobilus production the following spring. Applying fertilizer increased seed weight and cone length significantly, but thinning did not. Insects severely damaged the cone crop in the thinned stand. This study indicates that abundant seed crops, relatively free from insect damage, may be produced without expensive thinning and area preparation operations.

Response of Containerized Black Spruce and Jack Pine Seedlings to Fertilization Rate and Growing Medium
Response of Containerized Black Spruce and Jack Pine Seedlings to Fertilization Rate and Growing Medium

Author: Stephen John Colombo

Publisher: Maple : Ontario Tree Improvement and Forest Biomass Institute

Published: 1988

Total Pages: 24

ISBN-13:

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Despite the presence of handbooks for the production of containerized tree seedlings, the determination of appropriate rates of fertilization remains an inexact science, since the rate and timing of fertilization can be affected by factors such as local variation in water chemistry, growing media, and the environment in each greenhouse. This report presents the results of semi-operational trial of fertilizer rates and growing media to assess for black spruce and jack pine container seedlings; the range of fertilizer concentrations and seedling nutrient contents resulting in best seedling growth; and the effect of fertilization on bud development and fall freezing damage. Black spruce and jack pine seedlings were grown at the Swastika Tree Nursery according to operational greenhouse practices, at 0, 1/3, 1, 3 or 9X the operational fertilization rates for each species in three growing media.