ABSTRACTS ON WOOD TECHNOLOGY and
PROJECT PLANNING AND EVALUATION
1) SOME INVESTIGATIONS ON THE MECHANICAL PROPERTIES OF "I-214" POPLAR WOOD
ODC: 812.3:812.7:176.1 Populus.
Autor: SERTMEHMETOGLU, Z., ACAR, O., BIRLER, A.S.
"I-214" poplar wood is used for producing plywood, veneer plates, packing boxes, fiber and chip boards and paper pulp. Some mechanical properties of the wood of this tree species were investigated and are given below : Specific gravity (r12): 0.332 g/cm3 Compression strength in line of grains: 293.443 kg/cm2 Static bending: 528.630 kg/cm2 Dynamic bending: 1.921 kgm
2) SOME INVESTIGATIONS ON BALSAM POPLARS
ODC: 562.1:6515:167.1 Populus.
Author: SERTMEHMETOGLU, Z., ACAR, O., BIRLER, A.S.
However Balsam Poplars are not indigenous in Turkey, two different types of them have been observed growing in the Eastern Anatolia around the province Kars. These two types of Balsam Poplars were used for artificial hybridizations. Therefore some properties of them were studied and the findings are given below :
Balsam I: Rotation period 18 Years, Increment 0.012 m3/year
Balsam II: Rotation period 43 Years, Increment 0.017 m3/year
Balsam I and II: Specific gravity (r12) 0.423 g/cm3 Compression strength 350.833 kg/cm2 Static bending 653.374 kg/cm2
3) SOME INVESTIGATIONS ON ROTATION AND DRY MATTER YIELD FROM PINUS BRUTIA FORESTS WITH RELATION OF PAPER INDUSTRY IN SOUTH-EASTERN ANATOLIA
ODC: 861.0:651.5:174.7 Pinus
Authors: SERTMEHMETOGLU, Z., ACAR, O., BIRLER, A.S.
A study of yields from forests of Pinus brutia Ten. was made in this study. The research aterial was obtained from 30 sample trees felled in Pinus brutia forests around Antalya in Mediterranean of Anatolia. The results and the findings of this research study are summarized as follows: The basic density (dry weight/green volume) of the wood of P. brutia was estimated as 0.476 g/cm3 Basic density decreases upward along the tree stem. Dry matter yield tables were arrenged concerning three site classes as good, medium and poor site conditions. Rotation periods as regards dry matter yield were estimated 40 years, 44 years and 56 years for Good (I), Medium (II) and Poor (III) sites, respectively. Maximum mean annual dry matter increments by the end of the rotation periods were estimated as 0.977 ton/ha/year, for good sites 0.775 ton/ha/year for medium sites and 0.634 ton/ha/year for poor site conditions.
4) SOME INVESTIGATION ON THE MECHANICAL ROPERTIES OF EUCALYPTUS CAMALDULENSIS DEHN. WOOD
ODC: 812.3:812.7:861:176.1 Eucalyptus
Authors: ACAR, O., GOKCE, O.
Research material was obtained from the eucalyptus forest of Tarsus, southern Turkey. The research findings are as follow : Specific garvity (r12): 0.654 g/cm3 Compression strength (Parallel to grains): 541.3 kg/cm2 Static bending: 1174.5 kg/cm2 Dynamic bending: 3.051 kgm Hardness (Chalais-Meudon): 5.098 Tangential shrinkage: % 12.3 Radial shrinkage: 7.6 % Additionally, pulp and paper were produced in accordance with sulphate processing and the physical properties of the product paper were examined.
5) SOME TECHNOLOGICAL PROPERTIES OF WOOD OF POPULUS X EURAMERICANA CV. "64 H" IN COMPARISON WITH CLONE "I-214"
ODC: 812.3:812.7:176.1 Populus
Author: ACAR, O.
Populus x euramericana cv. 64 H is a Germany origin and is a natural hybrid between Populus deltoides and Populus nigra. Research material was obtained from a 12 years old plantation at 6m x 6m spacings growing in the nursery Izmit. The research findings are as follows:
I-214: Specific gravity 0.332 g/cm3. Compression strength (parallallel to
kg/cm2. Static bending 528.63 kg/cm2. Dinamic bending 1.921 kgm
64 H: Specific gravity 0.383 g/cm3. Compression strength (parallallel to grain) 303.1 kg/cm2. Static bending 585.43 kg/cm2. Dinamic bending 3.669 kgm
I-214 and 64 H both: Tangential shrinkage % 9.5. Volumetric shrinkage %13.2. Volume of basic density 0.35 g/cm3
Additional correlations were established between air dry specific growth and mechanical properties and also between tree height levels and shrinkage, basic density.
6) ANATOMICAL AND TECHNOLOGICAL PROPERTIES OF THE WOOD OF POPULUS EUPHRATICA Oliv.
ODC: 811:812.3:812.7:176.1 Populus
Author: ACAR, O.
Populus euphratica is a saline tolerant tree species. Besides anatomical and technological properties of the Euphrate Poplar wood, this study has investigated to find out if there exist differences between the wood from male and female individuals thus it could help artificial crossings. But no differences was estimated between male and female trees. The research material was obtained from trees growing in Urfa-Birecik on the valley of the river Euphrate. The technolojical findings are as follows: Specific gravity (r12): 0.480 g/cm3 Static bending: 733.7 kg/cm2 The modulus of elasticity (in bending): 84776 kg/cm2 Compression strength (parallel to grain): 409.3 kg/cm2 Compression strength perpendicular to grains: Perpendicular to annual rings: 67.69 kg/cm2, parallel to annual rings: 56.81 kg/cm2 Dynamic bending: 0.750 kgm Shearing strength: parallel to annual rings: 24.95 kg/cm2, perpendicular to annual rings: 28.20 kg/cm2 Hardness (Chalais-Meudon): 6.284
7) SOME INVESTIGATIONS ON THREE POPLAR CLONES GROWING ON HEAVY SOILS
ODC: 114.43:176.1 Populus
Authors: ACAR, O., OZDAL, H.
This study has aimed to assess the best growing poplar clone within three clones growing on heavy soils under climatic conditions of the region of Marmara. The research material was obtained from a 14 years old plantation at 6m×6m spacings growing in the poplar nursery, Izmit. The findings of study are as follows: Maximum increment has occured with I-214 poplar clone and it was followed by the clone no I-262. Maximum height was attained by I-214. The rotation period of the age to secure maximum m.a.i. were estimated 12, 12 and 11 years for the clones of I-214, I-262 and I-476 respectively. Estimated maximum mean m.a.i. were 17.1 m3/ha/year, 9.9 m3/ha/year and 7.7 m3/ha/year for the clones of I-214, I-262 and I-476 respectively. The mechanical and physical properties of the wood of I-214 poplars has been qualified most suitable for the industrial use.
8) SOME MECHANICAL PROPERTIES OF BLACK POPLAR WOOD FOR CONSTRUCTION USE
ODC: 812.3:812.7:176.1 Populus
Authors: ODABASI, Y., ACAR, O.
This study has investigated the technological properties of black poplar wood. The research material was obtained from 15 trees felled in the provinces Sivas, Ankara and Nigde. The findings are as follow: Tensile strength (parallel to grains) : 667 kg/cm2 Tensile strength (perpendicular to grains) : 19.11 kg/cm2 Shearing strength (across the grain) : 61.08 kg/cm2 Shearing strength (along the grain) : 26.54 kg/cm2 Dynamic bending : 0.25 kg/cm2 Specific gravity (r12) : 0.397 kg/cm3 According to this findings, black poplar wood can be qualified as a second class construction wood.
9) THE EFFECTS OF DEBARKING STANDING EUCALYPTUS TREES ON THE SHRINKAGE OF ITS WOOD
ODC : 812.214:176.1 Eucalyptus
Authors: ACAR, O., VURMA, Y., ERCAN M.
Eucalyptus wood shrinking more than 21%. This study has aimed to decrease the proportion of shrinkage by some debarking pre treatments made before felling trees. It is expected that debarking will reduce the shinkage and the proportion between tangential and radial will be approximately one. The experimental treatments were applied in a 10 years old stand in Tarsus the trees were debarked according to following design : Debarking height: 1 m and 2 m Debarking width: 1/5, 2/5, 3/5 and 4/5 of the tree circumference. Duration of debarked period before felling of trees: 6 months,12 months and 24 months. Result showed that debarking treatments and duration of debark period reduced shrinkage. Most effective height, 4/5 circumference in width and 24 months of debarked period. This combination has given following results: Tangential shrinkage was reduced from 13.6% to 8.8%. Radial shrinkage was reduced from 8.6% to 7.4%. The proportion of tangential shrinkage/radial shrinkage was reduced from 1.70% to 1.19%.
10) VARIATION OF SPECIFIC GRAVITY AND MOISTURE CONTENT ACCORDING TO CUTTING SEASON IN THE WOOD OF I-214 POPLAR TREES
ODC : 812:31 Populus
Authors: ACAR, O., ERCAN, M., SARIBAS, M.
In this study, specific gravity and contents of moisture of Populus x euramericana Cv. I-214 wood were investigated on pile according to felling season. The decreasing of moisture content has also determined after in 4 months. Research material was obtained from a 13 years old plantations at 5m×5m spacings growing in the nursery of Izmit. The trees felled in 4 seasons were logged in 3 m lenght. Half of the logs were debarked and the rest undebarked. The logs were classified in two groups as under and above of 25 cm diameter.