Performance of Scotch Pine Races Under Prairie Conditions

Cram, W. H.; Brack, Cris

doi:10.5558/tfc29334-4

Cited by 3 publications

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“…Report oj work at Denbigh Station. Unpublished report on file at USDA Forest Service Shelterbelt Laboratory, Bottineau , N. D. Cram and Brack (1953) studied vigor and seed crops of trees representing six geographic races of Scotch pine growing in a prairie-plains environment. Survival and growth seemed to be two distinct characteristics of the geographic races studied.…”

Section: Introductionmentioning

confidence: 99%

Scotch pine for the northern Great Plains /

Cunningham¹

1973

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Section: Introductionmentioning

confidence: 99%

Scotch pine for the northern Great Plains /

Cunningham¹

1973

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“…Studies on the performance of Scots pine in the Great Plains region of North America have reported Significant variation among provenances in survival, growth rate, crown density, winter foliage color, winter injury, stem crook, and cone production (Stoeckeler and Rudolf 1949;Cram and Brack 1953;Read 1971;Cunningham 1973;Van Haverbeke 1975, 1986b.…”

Section: Introductionmentioning

confidence: 99%

Twenty-two year results of a Scots pine (Pinus sylvestris L.) provenance test in North Dakota

Cunningham¹,

Haverbeke²,

Forest³

1991

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A provenance test of 49 seed sources of Scots pine (Pinus syIvestris L.) from eastern Europe, Russia, and Siberia was established in two plantations in north-central North Dakota. After 22 years, trees from seed sources within the region bounded by 20 0 to 57 0 east longitude and 50 0 to 58 0 north latitude were taller, and larger in diameter, and had denser crowns and greener winter foliage. Total height at age 5 and age 10 was highly correlated with total height at age 22, indicating that selection at an early age (5-10 years) may be possible in Scots pine breeding programs.Keywords: windbreaks, shelterbelts, seed sources, varieties, selection, crown density, winter foliage color, geographic variation, Pinus syIvestris L. 'Cunningham is at the Northern Great Plains

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“…Several graphic races of Scots pine have demonstrated a high degree of adaptability to the prairie region of Canada (2). Thus, precise measures of cone and seed maturity are required to increase efficiency of nursery production operations.…”

Section: Introductionmentioning

confidence: 99%

Maturity of Scots Pine Cones

Cram¹,

Lindquist²

1979

The Forestry Chronicle

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Cone and seed maturity of Scots pine (Pinus sylvestris L.) were evaluated for three seed years and several plantations in prairie Canada. Both specific gravity and moisture content provided reliable measures of cone maturity and were directly related to viability of the seed produced. Individual trees were found to differ as to cone and seed maturity for successive harvests in three years. Cones were mature when specific gravity decreased to 1.02 or a moisture content to 38% and produced seed with a high germination capacity even after four years of storage (81 to 95%). Distilled water is recommended for field testing of cone maturity for individual trees. Number of seeds per cone and seed weight were more directly related to cone size than to cone maturity. Neither color of cones nor color of seeds proved reliable measures of maturity.La m'aturite des cbnes et des semences de Pin sylvestre (Pinus sylvestris L.) a Btb calculee pour trois annees de semences dans plusieurs plantations des Prairies de I'Ouest canadien. La densite et le degre d'humidite ont tous deux permis de mesurer avec exactitude la maturite des c8nes et etaient directement rattaches a la viabilite des semences engendrees. On a trouve que les arbres differaient entre eux tant qu'a la maturite des cbnes et des semences pour les trois annees successives de recolte. La maturite des cbnes arrivait lorsque la densite baissait 5 1.02 ou le degie d'humidite a 38% et les semences produites avaient une capacite germinative elevee m&me aprhs quatre annees d'entreposage (81 h 95%). 11 est preferable d'employer de I'eau distill6 pour les tests sur le terrain pour la maturitb des cBnes d'arbres individuels. Le nombre de semences par cane et leur poids 6taient directement lies plutBt a la grosseur des cbnes qu'a leur maturit6. La couleur des cbnes pas plus que la couleur des semences n'a servi a mesurer exactement leur maturite.

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Performance of Scotch Pine Races Under Prairie Conditions

Cited by 3 publications

References 0 publications

Scotch pine for the northern Great Plains /

Scotch pine for the northern Great Plains /

Twenty-two year results of a Scots pine (Pinus sylvestris L.) provenance test in North Dakota

Maturity of Scots Pine Cones

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