Composition of Turpentine of Lodgepole × Jack Pine Hybrids

Mirov, N. T.

doi:10.1139/b56-036

Cited by 40 publications

(10 citation statements)

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“…labulaeformW and I? yunnanen.\ir by Mirov (1956). Of the 2 1 characters observed from the inner surface of the cuticle, the latter two specks share 14 characters, and are quite similar for the othcr characters.…”

Section: General Features Ofthe Needles Of Pinusmentioning

confidence: 92%

Cuticle micromorphology of leaves of Pinus (Pinaceae) in east and south-east Asia

Kim

Whang

Hill

1999

Botanical Journal of the Linnean Society

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Section: General Features Ofthe Needles Of Pinusmentioning

confidence: 92%

Cuticle micromorphology of leaves of Pinus (Pinaceae) in east and south-east Asia

Kim

Whang

Hill

1999

Botanical Journal of the Linnean Society

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“…Numerous pine species have been crossed successfully and hybrids which seem promising to increase woodland production are Knobcone pine (Pinus attenuata Lemmon) x Monterey pine, Jack pine (P. banksiuna Lamb)xLodgepole pine, Balkan White pine (P. peuce (Grasb. The chemical composition of the turpentines in the hybrid pines tends to be intermediate in chemical character between those of the parent trees (Mirov, 1956) and may provide resistance to disease and pests. Backcrossing of the hybrid between Jeffrey (P. jeteryi Grev.…”

Section: ( 5 ) Genetical Eflectsmentioning

confidence: 99%

“…pines on Jeffrey pine has produced a vigorous hybrid resistant to pests such as resin midge and weevils and it is also hardy to cold (Anon., 1948). The chemical composition of the turpentines in the hybrid pines tends to be intermediate in chemical character between those of the parent trees (Mirov, 1956) and may provide resistance to disease and pests.…”

Section: ( 5 ) Genetical Eflectsmentioning

confidence: 99%

Organic Production, Turnover and Mineral Cycling in Woodlands

Ovington

1965

Biological Reviews

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Summary 1. A distinction is made between the production of tree trunks (economic) and the production of all kinds of primary organic matter (biological) by woodland plants capable of photosynthesis. 2. Yield tables, quality class and site index are considered to be reasonably satisfactory indicators of trunk wood production, but their value as indicators of biological production has not been demonstrated. 3. Some factors, namely geographical, weather, edaphic, genetical, management and biotic, are considered in relation to their influence on economic production. 4. Attention is drawn to the relative paucity of data on biological production. 5. The available information of woodland biomass suggests that the greatest biomass of the world's forests exceeds 500 times 103 kg. of oven‐dry material per hectare. 6. The annual accumulation of plant material in woodland ecosystems can be very rapid, up to about 20 kg./ha. when growth is active. The bulk of the organic matter is in tree trunks but where decomposition is slow large amounts of organic matter are present as litter on the forest floor. 7. Biomass change is considered an unsuitable measure of biological production since it is affected greatly by tree harvesting. 8. Net primary production is regarded as a better measure of biological production. Some of the more serious sources of error in determining net primary production are emphasized. Generally net primary production is underestimated because of failure to take into account the removal of photosynthate by animals and because of infrequent sampling so that the production of plant parts such as inflorescences is missed. 9. Woodlands are shown to be one of the most productive terrestrial communities, giving a range of annual production as 103 kg./ha., from 5 for fir forests of the northern taiga in the U.S.S.R. to 33 in tropical rain forests. The capacity of forests to produce large amounts of organic matter annually is attributed to the large root and leaf mass which permit relatively full use to be made of the soil and incident solar energy. 10. A large part of the organic matter produced by woodland plants is broken down by the secondary producers. Associated with the annual turnover of organic matter in woodlands, nutrient elements circulate through woodland ecosystems. The annual retention of nutrient elements within the biomass is much less than what is returned to the soil by litter fall. Taking a hard beech forest in New Zealand as an example, the woodland plants have an annual uptake as kg. per hectare of potassium, calcium, magnesium, phosphorus and nitrogen of 34, 84, 12, 3‐3 and 40 respectively, but about 30, 74, 11, 2–6 and 37 are returned annually in the litter fall. 11. The annual cycle of mineral elements is regarded as a polycyclic system affected by various input and output factors. The loss of nutrients through the harvesting of tree boles, for instance, is relatively small compared to the addition of nutrients in precipitation. 12. Soil changes resulting from the variable balance in the fact...

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“…In 2002, the outbreak expanded beyond the Rocky Mountains and since then has moved beyond the eastern edge of the lodgepole pine range in north-central Alberta (Safranyik et al, 2010). In this region, forest composition shifts from lodgepole pine to jack pine (Pinus banksiana)-dominated boreal forests through a zone of lodgepole × jack pine hybrids (Moss, 1949;Mirov, 1956). Within this hybrid zone, MPB has attacked both hybrid and pure jack pines (Cullingham et al, 2011).…”

Section: Introductionmentioning

confidence: 99%