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2() J.O'DRISCOLL importance, in comparison with spruces, where it can be a major problem. In one sample the percentage of compression wood was high occurring on the side opposite to that of the prevailing wind. The species' permeabilility was poor making it difficult to treat with timber preservatives (Anon 1965). These tests were carried out on trees from basically the same provenance group. A study in Britain between a Washington coast provenance and an interior British Columbia provenance from Prince George showed that there was a significant difference hetween provenances in all characteristics measured. The tests applied particularly to pulp properties as no sawing tests were curried out. In the coastal provenance density was 20% greater than that of the interior provenance, Compression wood was also much higher. Pulp yield was greater in the south coastal provenance. Because of greater tracheid length in the Prince George provenance hoth breaking length and burst factor of the interior provenance was superior. It was also found that vigour had no effect on the density (Henderson and Petty 1972). Experience with the marketing of home grown timber has shown that it makes excellent panelling and high quality furniture. Much of the present output from state forests is being used for pulp and pallet wood. Where large timber is available it is converted to panelling and can commend a premium of £20 per m 3 standing. Unfortunately due to the small area of older coastal provenances there is not a lot of this type of material available. FUTURE Experience to date in Irish forestry has shown that the most. productive provenances are from the species south coastal distribution. Of recent years some disquiet has arisen with regard to the degree of basal sweep recorded in younger stands. Suggestions have been made that an inland or a north coastal provenance should he used to overcome this problem. However, no hasty decisions should be taken as it must be remembered that the site types at present being planted are more extreme than earlier ones. Were these to be planted with slower growing provenances they might fail completely or require such a fertiliser input as to make the entire operation uneconomic. Their longer rotation period required to get them to saw log category would also throw some doubt on their economic value. To be an economic proposition they would need to be planted on site types normally planted with Sitka spruce. A further suggested alternative is interprovenance hybrids. These have been shown to grow straight and vigorously in Great Britain (Faulkner et al. 1977). There, however, remains the one problem of producing sufficient reproductive material, be it seed or cuttings,
LODGEPOLE PINE IN IRISH FORESTRY 21 to make it a viable proposition. This problem may of course be overcome in the future. A more immediate and possibly a more rewarding remedy would be to attempt to reduce some of the possible contributing factors to basal sweep in the coastal provenances. This would involve examining all the methods and techniques of establishing crops of this provenance, treating the species in its own right and evolving a silviculture suited to it as distinct from spruce management. The influence of stand treatment such as pruning and recent machine grading tests are encouraging in this respect. (Gallagher 1975 , Phillips 1978). In this way the vast potential of these provenances for growth and yield would be utilised to the full . REFERENCES Anon 1933, 1977 Report of the Minister for Lands on Forestry, Dublin, Ireland. Anon 1965 Properties of home grown Pinus contorta. Research Record No. 2 Forest and Wildlife Service, Dublin, Ireland (Unpublished). Anon 1975 Provisional Yield Tables for Lodgepole pine. Research Communication No. 16. Forest and Wildlife Service, Dublin, Ireland (Unpublished). Anon 1976, 1977 Report ofthe Ministerfor Fisheries and Forestry on Forestry and Wildlife Service, Dublin, Ireland. Clinch, P. 1977 Growth patterns in young conifer crops; effect of second manuring. Research Communication No. 18. Forest and Wildlife Service, Dublin, Ireland (Unpublished). Critchfield, W. B. 1957 Geographic variation in Pinus contorta. Maria Moors Cabat Foundation. Publication No.3 Harvard University Press. Critchfield, W. B. 1978 The distribution, genetics and silvics of lodgepole pine. Proceedings Joint IUFRO Provenance Working Group Meeting, Vancouver British Columbia (in press). Critchfield, W. B. and Little, E. L. 1976 Geographic distribution of pines ofthe world. USDA Forest Service Mise!. Publication 991, Washington. Elwes, H . J. and Henry A. H . 1910 Trees of Great Britain and Ireland. Vo!. 15, pp 1134-1139. Faulkner, R., Fletchner, A. M., Johnstone, R . C. B. and Forrest, G. I. 1977 Genetics, Forest Research, Forestry Commission, London.
Page 1 and 2: Vol. 37. Ro. 1. 1980 IRISH FORESTRY
Page 3 and 4: ...................................
Page 5 and 6: WICKWOOD TIMBER PRODUCTS Manufactur
Page 7 and 8: Poulan Chain Saws From the fastest
Page 9 and 10: Commonwealth Forestry Bureau , FORE
Page 12 and 13: Your friend for life ~ Bank 1F1reia
Page 14 and 15: IRISH FOREST PRODUCTS LTD. 28 Upper
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Page 18 and 19: PORTLAOISE SAWMILLS MIDLAND FORESTR
Page 20 and 21: :2 Notes for the Assistance of Cont
Page 22 and 23: Council of the Society of Irish For
Page 24 and 25: The Society of Irish Foresters The
Page 26 and 27: 1.0'DRISCOLL 6~ • var. contort a
Page 28 and 29: \0 J. O'DRISCOLL Most of the commer
Page 30 and 31: 12 1.0'DRISCOLL ~ coastal ~o 0 inla
Page 32 and 33: 14 1.0'DRISCOLL Of the total record
Page 34 and 35: 16 J . O 'DRISCOLL Table 2 - Growth
Page 36 and 37: IX J. O'DRISCOLL region and north a
Page 40 and 41: 22 J. O'DRISCOLL Forbes, A. C. 1928
Page 42 and 43: JOHN J. GARDINER In this context it
Page 44 and 45: 26 JOHN J. GARDINER 80 % 60 - --- P
Page 46 and 47: JOHN J. GARDINER profit in its twel
Page 48 and 49: 30 JOHN J. GARDINER 10 Styan, G. E
Page 50 and 51: 32 P. McCUSKER the audience is enha
Page 52 and 53: 34 P. McCUSKER you can introduce hu
Page 54 and 55: Swedish Forestry A Question of Bala
Page 56 and 57: 38 E. P. FARRELL growing stock was
Page 58 and 59: 40 E. P. FARRELL During the late 19
Page 60 and 61: 42 E. P. FARRELL production in the
Page 62 and 63: 44 E. P. FARRELL ,+50,000 in the 19
Page 64 and 65: 46 E. P. FARRELL stimulate the fore
Page 66 and 67: 48 Whole Tree Harvesting in Sitka S
Page 68 and 69: )0 M. L. CAREY METHODS Field: The c
Page 70 and 71: Table 2 Diameter Breast Height, Bas
Page 72 and 73: 54 M. L. CAREY (Carey and O'Brien,
Page 74 and 75: Table 4 Chemical Analyses Used in N
Page 76 and 77: 5H M. L. CAREY Table 5 Regression E
Page 78 and 79: (,0 M. L. CAREY However most of the
Page 80 and 81: 02 M. L. CAREY idea to consider har
Page 82 and 83: 64 Notes and News The Increasing De
Page 84 and 85: 66 NOTES AND NEWS This forest, the
Page 86 and 87: 6X Letters Dear Sir, A recent meeti
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70 Book Reviews IRISH FORESTRY POLI
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72 BOOK REVIEWS Water by Dr Drew. i
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74 Society Activities ANNUAL GENERA
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SOCIETY OF IRISH FORESTERS STATEMEN
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7S SOCIETY ACTIVITIES Other Busines
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FORESTRY COMMISSION PUBLICATIONS Re
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I • • WOODFAB •••••
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The Irish Timber Growers Associatio
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TREE -- PROBLEMS • SOUTHERN TREE
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