Preferences help
enabled [disable] Abstract
Number of results
2020 | 29 | 3 | 162-178
Article title

Seasoning Characteristics and Potential uses of Eucalyptus pilularis, Eucalyptus viminalis and Trichilia dregeana lumber tree species

Title variants
Languages of publication
Technical information on lumber seasoning, moisture content (MC), density, mechanical, workability and chemical characteristics would strongly determine rational utilization of each lumber species. A study was conducted on home-grown two Eucalyptus species (Eucalyptus pilularis and Eucalyptus viminalis) and one indigenous (Trichilia dregeana) timbers with the main objective of determining some characteristics of lumber that will indicate quality and proper utilization. Study species were harvested from Shashemene, Asella and Arjo sites, respectively. The experimental design for seasoning and density was complete randomized design, a factorial experiment. The experiments were conducted using air and kiln seasoning methods. To determine initial moisture content oven drying method was used. The mean initial MC for the three timber species were 48.25%, 56.1% and 65.45%, respectively. The species were classified as very rapid seasoning rate during kiln seasoning. The mean shrinkage values were Tangential (6.31, 4.94 and 4.43%), radial (3.4, 4.02 and 2.10%) volumetric (9.46, 8.6 and 6.37%), when they seasoned from green to 12% MC, respectively. Seasoning defects such as cup, bow, crook, end split, surface and end-checks were observed, though the extent varies with species. The density of E. pilulalris, E. viminalis and T. dregeana at 12% MC was 780, 810 and 530 Kg/m3, respectively. The one-way analysis of variance indicated that there was significant difference (P>0.001) in initial MC, final MC, density values at different MC and shrinkage characteristics. They revealed good lumber characteristics and qualities, comparable with many indigenous and home-grown exotic timber species in density, seasoning rate and shrinkage. The tree species have to be well managed, properly harvested and sawn. Boards have to be properly stacked and seasoned to about 12% MC, with kiln and air seasoning methods that can help to minimize seasoning time, seasoning defects, shrinkage characteristics and increase quality.
Physical description
  • Ethiopian Environment and Forest Research Institute, Wood Technology Research Center, P.O.Box 2322, Addis Ababa, Ethiopia
  • Ethiopian Environment and Forest Research Institute, Wood Technology Research Center, P.O.Box 2322, Addis Ababa, Ethiopia
  • [1] Abassali N.S., (2012). Variation of Basic Density in Eucalyptus camaldulensis dehnh Wood Grown in Iran. Middle-East Journal of Scientific Research 11 (10): 1472-1474
  • [2] Berrocal A., Moya R., Rodríguez-Solis A. M. & Muñoz F., (2017). Drying of Plantation-grown Tectona Grandis Wood with daily-controlled drying rate schedules. Journal of Tropical Forest Science 29(1): 69-79
  • [3] Denig, J., E.M., Wengert, W.T. Simpson., (2000). Drying of hardwood lumber. Forest Products Laboratory. Forest Service. United States. Department of Agriculture (USDA). General Technical Report. PL-GTR-118. 138 pp.
  • [4] Eduardo P. C., Pablo S. P.& Gustavo A. L., (2010) Provenance variation and genetic parameters of Eucalyptus viminalis in Argentina, Tree Genetics & Genomes: 981–994
  • [5] Eldeen I.M.S., Van Heerden F.R. and Van Staden J, (2007). Biological activities of cycloart-23-ene-3,25-diol isolated from the leaves of Trichilia dregeana. South African Journal of Botany 73: 366–371
  • [6] Gagan S., Jaideep, Varinder S., R.K Dhawan, (2016). Eucalyptus Genus: A Review. Journal of Pharmacy Research, 10(10), 609-617
  • [7] Gemechu, K., Tsegaye, B., and Mulugeta, L. (2018). Actual and Potential Industrial Uses of Eucalyptus Wood in Addis Ababa, Ethiopia. The International Journal of Engineering and Science 7.6, 74-79
  • [8] Getachew D., Wubalem T., Demil T. Worku F. Gemechu K. and Girma T. (2007). Performance of preservative treatments on 32 timber tree species against Termites and Fungal attack at Bako South Western Ethiopia. Ethiopian Journal of Science, 30(2): 103-116
  • [9] Getachew D., Anteneh, Gemechu K. and Saifu A., (2008) Seasoning Characteristics and Potential Uses of Gmelina arborea Lumber Tree Species Grown at Bonga. Ethiopian Environment and Forest Research Institute
  • [10] Getachew D., Gemechu K., Anteneh T., Saifu A., Tsegaye W., and Tesfanesh A., (2018) Effective Lumber Seasoning Technologies and Uses of Pinus patula ssp tecunumanii Tree Species Grown at Bonga, Ethiopia Ethiopian Environment and Forest Research Institute, proceeding pp 399-420
  • [11] Getachew D., Gemechu K., Worku F. and Yiheyis T., (2005). Some Physical Properties of Juniprous procera and Eucalyptus deglupta Sawn Timbers. Ethiopian Journal of Natural Science, 7(2): 219-237
  • [12] Getachew, D. and Wubalem, T. (2010). Major Characteristics and Potential Uses of Eucalyptus Timber Species Grown in Ethiopia, Gil L, Tadesse W, Tolosana E & López R, Eds. (2010) Eucalyptus Species Management, History, Status and Trends in Ethiopia. Proceedings from the Congress held in Addis Ababa. September 15th-17th
  • [13] Gil L, Tadesse W, Tolosana E &López R, Eds. (2010). Eucalyptus Species Management, History, Status and Trends in Ethiopia. Proceedings from the Congress held in Addis Ababa. September 15th-17th,
  • [14] Habtemariam, K. and Zeleke, E., (2014). The importance of forestry in Ethiopia and the need for investing in the sector to meet national goals and international commitments (Un-published report).
  • [15] Herajarvi H., (2009). Effect of drying technology on aspen wood properties. Silva Fennica 43(3): 433–445
  • [16] Josue J., (2004) Some Wood Properties of Xylia Xylocarpa Planted in Sabah. Sepilok Bulletin 1: 1-15
  • [17] Mahdi S., Hadi D., Hamid R.T., Sina H., Hadi G., and Mohammad A. H., (2013) The Impact of red heartwood on drying characteristics and mass transfer coefficients in beech wood. Austrian Journal of Forest Science, Seite 85 130. Jahrgang, Heft 2, S. 85–101
  • [18] Manahil Fadl Elseed Ibrahim Malik, Abdelazim Yassin Abdelgadir, (2015) Effect of Growth Rate on Wood Density of Eucalyptus camaldulensis Wood of Coppice Origin Grown in White Nile State Sudan. Journal of Forest Products & Industries, 2015, 4(3), 86-93
  • [19] Megha S.S. and Sanjay P.S., (2015). Solar Drying Technologies: A review. International Refereed Journal of Engineering and Science Volume 4, Issue 4, PP.29-35
  • [20] Ofori J. and Brentuo B., (2010). Green moisture content, basic density, and characteristics of the wood of Alstonia boonei, Antrocaryon micraster, Bombax buonopozense, Dialium aubrevillei and Sterculia rhinopetala. Ghana Journal of Forestry, Vol. 26, 41-49
  • [21] Ogunsanwo, O.Y. and Amao-Onidundu, O.N, (2011). Selected Drying Characteristics of Plantation grown Gmelina arborea under an experimental solar drying kiln. Journal of Agriculture and Social Research Vol. 11, No. 2
  • [22] Pierre B., Alireza K. and Cecilia B., (2016). Understanding effects of drying methods on wood mechanical properties at Ultra and Cellular levels. Wood and Fiber Science, 48(2), 1-12
  • [23] Djeison Cesar Batista, Ricardo Jorge Klitzke, Márcio Pereira da Rocha, Raciela Inez Bolzon de Muñiz, Tharcia Ribeiro Batista1, (2013) Volume Loss as a Tool to Assess Kiln Drying of Eucalyptus Wood. Floresta e Ambiente 20(2): 250-256
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.