Evaluation of growth response, stand value and financial return for pre-commercially thinned jack pine stands in Northwestern Ontario

2005 ◽  
Vol 209 (3) ◽  
pp. 225-235 ◽  
Author(s):  
Q.J. Tong ◽  
S.Y. Zhang ◽  
M. Thompson
Keyword(s):  
Growth Response ◽  
Jack Pine ◽  
Financial Return ◽  
Northwestern Ontario ◽  
Pine Stands

Effect of nitrogen, phosphorus and magnesium fertilizers on growth of a semimature jack pine forest, northwestern Ontario

1995 ◽  
Vol 71 (4) ◽  
pp. 422-425 ◽  
Author(s):  
I. K. Morrison ◽  
N. W. Foster
Keyword(s):  
Pinus Banksiana ◽  
Growth Response ◽  
Jack Pine ◽  
Class Iii ◽  
Forest Fertilization ◽  
Site Class ◽  
Northwestern Ontario ◽  
Volume Increment ◽  
A Site ◽  
Nitrogen Phosphorus

In the spring of 1969, an experiment to test response (mean DBH, BA, BA%, and total and merchantable volume increments) to nitrogen (N), phosphorus (P) and magnesium (Mg) fertilizers, singly and in combination, was established in a semimature jack pine (Pinus banksiana Lamb.) forest on a Site Class III sandy site in the Dryden-Sioux Lookout area of northwestern Ontario, Canada. Analysis of variance of 10-year increments revealed highly significant (P = 0.01) responses of mean DBH increment, BA and percent BA increments, and total and merchantable volume increments to N, but no response to either P or Mg. An interaction between N and P was noted, however, in relation to BA and to total and merchantable volume increments. The best treatment in terms of total volume increment over that of the control was 151 kg N ha−1 plus 62 kg Mg ha−1, which produced ca. 16 m3 ha−1 of extra wood over 10 years. Key words: forest fertilization, nitrogen, phosphorus, magnesium fertilizers, jack pine growth response

Negligible Cull and Growth Loss of Jack Pine Associated with Globose Gall Rust

1983 ◽  
Vol 59 (6) ◽  
pp. 308-311 ◽  
Author(s):  
H. L. Gross
Keyword(s):  
Pinus Banksiana ◽  
Jack Pine ◽  
Tree Size ◽  
The Other ◽  
Size Difference ◽  
Northwestern Ontario ◽  
Endocronartium Harknessii ◽  
Growth Loss ◽  
Pine Stands ◽  
Mature Stands

The height and diameter of galled and unaffected jack pine (Pinus banksiana Lamb.) were compared for five stands in northwestern Ontario. The severity of infection by globose gall rust (Endocronartium harknessii [J.P. Moore] Y. Hirat.) was rated as the total number of galls per tree and the number of stem galls per tree.Comparison of galled with unaffected trees in all stands showed essentially no size difference. Tree size increased relative to the number of galls per tree in one of the stands. This relationship was interpreted as reflecting that large individuals had more sites susceptible to infection. Trees were more uniform in size for the other stands and no size difference associated with numbers of galls was apparent.Galls were observed on the branches but not on the main stem of trees studied in mature stands. Hence, defect associated with the merchantable portion of the bole was nil. Both stem galls and branch galls were fairly common in young stands, an indication that jack pines with stem galls usually die as stands mature. Observations in other jack pine stands indicate that galled tissue and associated tree parts frequently do die.

THE JACK PINE BUDWORM AND THE SPRUCE BUDWORM, CACOECIA FUMIFERANA CLEM. (TORTRICIDAE)

1943 ◽  
Vol 75 (11) ◽  
pp. 207-211 ◽  
Author(s):  
A. W. A. Brown ◽  
Margaret R. MacKay
Keyword(s):  
Spruce Budworm ◽  
Jack Pine ◽  
Balsam Fir ◽  
The Past ◽  
Northwestern Ontario ◽  
Jack Pine Budworm ◽  
Pine Stands

During the past decade a severe outbreak of budworm has been in progress on jack pine in northwestern Ontario, following similar infestations in Michigan and Minnesota. It has been observed that budworm on jack pine does not spread to adjacent stands of balsam fir and spruce, and similarly that outbreaks on fir and spruce do not spread to adjacent jack pine stands.

The Effect of Jack-pine Staminate Flowers on the Size of Larvae of the Jack-pine Budworm, Choristoneura sp.

1950 ◽  
Vol 82 (2) ◽  
pp. 34-43 ◽  
Author(s):  
R. R. Lejeune
Keyword(s):  
Jack Pine ◽  
New Variety ◽  
Early Stages ◽  
Northwestern Ontario ◽  
Jack Pine Budworm

The jack-pine budworm, Ohoristoneura sp., was first recorded by Graham (5, 6) as a new variety or race on jack pine. Subsequent studies by Graham (6 showed that in the early stages of their development the larvae of this insect prefer jack-pine staminate flowers as a habitat. Population records from Manitoba and northwestern Ontario indicate that infestations of the jack-pine budworm are invariably associated with an abundance of staminate flowers.

Estimation de la production de jeunes plantations de pin rouge et de pin gris du sud du Québec

1976 ◽  
Vol 6 (4) ◽  
pp. 478-486 ◽  
Author(s):  
H. A. Bolghari
Keyword(s):  
Multiple Regression ◽  
Jack Pine ◽  
Red Pine ◽  
Pine Plantations ◽  
Regression Equations ◽  
Pine Plantation ◽  
South Shore ◽  
Pine Stands ◽  
Natural Stands ◽  
St Lawrence River

Multiple regression equations have been developed to predict yield from young red pine and jack pine plantations. Data from 446 sample plots representing young red pine and jack pine stands located on the south shore of the St. Lawrence River between Quebec and Montreal were analysed. The red pine plantation yielded more than the jack pine. However, in plantation both species yield more than in natural stands. Taking into account the age and spacing of the sampled plantations, the equation obtained can provide information on yield of red pine and jack pine stands the maximum spacing of which is 3 × 3 m, up to the age of 45 and 35 years respectively. The equations will allow the construction of preliminary yield tables for both species.

IMMEDIATE AND LONG-TERM EFFECTS OF INSECTICIDE APPLICATION ON PARASITOIDS IN JACK PINE STANDS IN QUEBEC

1972 ◽  
Vol 104 (2) ◽  
pp. 263-270 ◽  
Author(s):  
Peter W. Price
Keyword(s):  
Relative Abundance ◽  
Jack Pine ◽  
Ground Vegetation ◽  
Long Term Effects ◽  
Aerial Application ◽  
Insecticide Application ◽  
Number Of Species ◽  
Adult Parasitoid ◽  
Pine Stands

AbstractParasitoid populations were sampled before, and for 4 years following, an aerial application of the insecticide phosphamidon to control a sawfly outbreak. Adult parasitoid mortality was high because of spraying, but a reservoir of parasitoids in host cocoons remained to repopulate the treated areas. In moister sites the number of species decreased and their relative abundance changed, but moderate numbers of parasitoids remained 4 years after spraying. In a dry site with little ground vegetation, none of the species present before spraying remained by the fourth year.

Microsite Soil Compaction Enhances Establishment of Direct-Seeded Jack Pine in Northwestern Ontario

1992 ◽  
Vol 9 (3) ◽  
pp. 107-112 ◽  
Author(s):  
Laird W. Van Damme ◽  
Lisa Buse ◽  
Steve Warrington
Keyword(s):  
Soil Compaction ◽  
Black Spruce ◽  
Mineral Soil ◽  
Sowing Date ◽  
Jack Pine ◽  
Early Spring ◽  
Northwestern Ontario ◽  
Direct Seeded ◽  
Treatment Responses ◽  
Sowing Season

Abstract The effects of microsite soil compaction on direct seeding of jack pine and black spruce were tested in conjunction with Bracke scarification. The compaction effect was achieved by manually tamping the seed spot. It was anticipated that compaction might decrease the number of seeds required to establish seedlings and extend the sowing season in Northwestern Ontario Experimental results showed that compaction increased the number of scalps stocked with jack pine by 30% after the first growing season. Compaction with a pyramidal surface doubled the percent stocked scalps over conventional sowing for the latest sowing date. Compaction may allow an extension of the jack pine sowing season from late June into early July. Still, early spring sowing provided the best overall results for both species. Compaction effects were not detected for black spruce. The experimental sowing rate of five seeds per scalp may have been insufficient to detect black spruce treatment responses on the dry mineral soil seed spots. North. J. Appl. For. 9(3):107-112.

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