Download Full PDF - 28.09 MB - The Society of Irish Foresters
Download Full PDF - 28.09 MB - The Society of Irish Foresters Download Full PDF - 28.09 MB - The Society of Irish Foresters
Crop Structure and Productivity for Unthinned Sitka Spruce 43(3) Dd on fi d " "Dd= 20.8673-2.8972fi d+ 0.4427 Rd2-0.2404 Hd 3 +0.00034 Rd 4 (F= 68)(4) G on RdG = 23.0205-0.0404 fid+0.6727 fid2-0.0559 fii+.00138 fid4 F = 22)(.1 % F = 10.8)These with the 95 % confidence bands for observed values areexpressed graphically on figures 2 (A, B, C). The distribution of plotsaccording to V 8 is given on figure 2A. Though the scatter of data iswide for each curve all regressions are statistically significant at ther,as~1140 area /ha.m 2120[ B]10080604204 12 16 '.", 20 · 24Top height m
44 Irish Forestry36 Dom.Diam./ha.em3228242016124 2'0Top Height m.1 % level. In terms of a single variable related to top height thesecan be regarded as the range of production categories. The highvalues on these curves must be regarded with caution due to sparsityof data.While the relationship between individual variables and top heightcan give a graphical indication of productivity categories in terms ofvolume, basal area and diameter, it was felt that a combination ofthese variables combined could provide a better instrument forpredicting volume. It was also desirable to see if basal area, ordominant diameter-as easily measurable variables, were more
- Page 1 and 2: IRISH FORESTRYJournal of the Societ
- Page 3: Control weedsin forestryplantations
- Page 6 and 7: 'CL;EiCG DU'CCAN,~S [S 'OCI ,ATES L
- Page 8 and 9: McCULLOCHWorlds best-selling CHAIN
- Page 10 and 11: IRISH FORESTRY:CONTENTS(A uthors al
- Page 12 and 13: IRISH FORESTRYVolume 29 1972 No.2Ed
- Page 14 and 15: Some Forestry Problems in the Europ
- Page 16 and 17: Some Forestry Problems in the Europ
- Page 18 and 19: Some Forestry Problems in the Europ
- Page 20 and 21: Some Forestry Problems in the Europ
- Page 22 and 23: Some Forestry Problems in the Europ
- Page 24 and 25: The Response of Sitka Spruce to Sul
- Page 26 and 27: The R esponse of Sitka Spruce to Su
- Page 28 and 29: The R esponse of Sitka Spruce to Su
- Page 30 and 31: The R esponse of Sitka Spruce to Su
- Page 32 and 33: The R esponse of Sitka Spruce to Su
- Page 34 and 35: The R esponse of Sitka Spruce to Su
- Page 36 and 37: The Response 0 fSitka Spruce to Sul
- Page 38 and 39: Labour Cost Trends in ForestNurseri
- Page 40 and 41: Labour Cost Trends in Forest Nurser
- Page 42 and 43: SOJ?e Patterns in Crop Structureand
- Page 44 and 45: Crop Structure and Productivity for
- Page 46 and 47: VB VtI - - --- -VB Vt + +ASHd + +H
- Page 48 and 49: LE 3Crop Structure and Productivity
- Page 50 and 51: Crop Structure and Productivity for
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- Page 62 and 63: Trees Woods and Literature- · 7A w
- Page 64 and 65: M eetings 55papers were presented,
- Page 66 and 67: Notes and News 57strips, scattered
- Page 68 and 69: Notes and News 59material. Laborato
- Page 70 and 71: Obituary 61opened on 29th May 1968
- Page 72 and 73: Reviews 63includes an Appendix VI b
- Page 74 and 75: Reviews 65where the fine lines of d
- Page 76 and 77: COUNCIL REPORT FOR 1971Following th
- Page 78 and 79: PUBLIC BUSINESSThe main item of pub
- Page 80 and 81: Society Activities 711980 and beyon
- Page 82 and 83: Society Activities 73ill Macroom fo
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44 <strong>Irish</strong> Forestry36 Dom.Diam./ha.em3228242016124 2'0Top Height m.1 % level. In terms <strong>of</strong> a single variable related to top height thesecan be regarded as the range <strong>of</strong> production categories. <strong>The</strong> highvalues on these curves must be regarded with caution due to sparsity<strong>of</strong> data.While the relationship between individual variables and top heightcan give a graphical indication <strong>of</strong> productivity categories in terms <strong>of</strong>volume, basal area and diameter, it was felt that a combination <strong>of</strong>these variables combined could provide a better instrument forpredicting volume. It was also desirable to see if basal area, ordominant diameter-as easily measurable variables, were more
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