Measuring Butt Log and Middle Log Volume of Eucalyptus Camaldulensis Using Different Methods in Erbil Province


  • Ameer Abdulazeez Abdulla Dept. of Forestry, Coll. of Agricultural Engineering Sciences, Salahaddin University-Erbil, Kurdistan Region, Iraq.
  • Mohammed Hadayat Obeyed Dept. of Forestry, Coll. of Agricultural Engineering Sciences, Duhok University, Kurdistan Region, Iraq.



Butt log volume, Middle log volume, Eucalyptus, Newton`s formula, Centroid method, Huber`s formula.


The volume of each butt log and middle log of an individual tree at a 5-meter log length was calculated by using five different formulas (Newton`s, Smalian`s, Huber`s, Hossfeld`s, and Centroid method). The volume of the butt logs and middle logs was compared to the real volume (control), which was calculated by aggregating the volume measurements at (0.5) meters using Newton's method. Measurements were taken from 50 trees of (Eucalyptus camaldulensis) planted in Al-Khabat area in Erbil governorate. The sampled trees presented diameter at breast height (DBH) ranged from 30.2 to 75.6 cm and total tree height range from 13 to 27 m. The result showed that Newton`s formula was superior to all other formulas for estimating butt log volume of eucalyptus tree species plantation and Smalian`s formula was less accurate than other formulas. On the other hand, the centroid method was superior to all other formulas for estimating the middle log volume of eucalyptus tree species in the district of khabat in Erbil province. Moreover, the Hossfeld formula was less accurate than other formulas.


Akossou, A.Y., Arzouma, S., Attakpa, E.Y., Fonton, N.H. and Kokou, K., 2013. Scaling of teak (Tectona grandis) logs by the xylometer technique: accuracy of volume equations and influence of the log length. Diversity, 5(1), pp.99-113.

Al-allaf, M., 2018. Comparison of centroid method and three standard formula for estimating log volume . Mesopotamia Journal of Agriculture, 46(1), pp.143-150.

Avery, T.E. and H.E. Burkhart. 2002. Forest Measurements. 5th ed. McGraw Hill, New York. 456 p.

Bruce, D. 1982. Butt log volume estimators. Journal of Forest Sciences. 28:489-503.

Finger, C.A.G., 1992. Fundamentos de biometria florestal.

Fonweban, J.N., 1997. Effect of log formula, log length and method of measurement on the accuracy of volume estimates for three tropical timber species in Cameroon. The Commonwealth Forestry Review, pp.114-120.

Graves, H.S., 1906.ForestMensuration.NewYork, USA. John Wiley and Sons. 458 p.

Husch, B., Beers, T.W. and Kershaw Jr, J.A., 2002. Forest mensuration. John Wiley & Sons.

Lück, A., 2014. Integrated drought risk management—DRM—National framework for Iraq: an analysis report.

Ministry of Planning-KRG. Regional Development Strategy for Kurdistan Region. 2012–2016 Final report 2017; Ministry of Planning-KRG: Erbil, Iraq, 2017.

Obeyed, M., (2019). Testing accuracy of butt log volume estimated by using seven formulas for Calibrain pine (Pinus brutia Ten). Mesopotamia Journal of Agriculture, 45(3), pp.321-330.

Ozcelik, R., Wiant Jr, H.V. and Brooks, J.R., 2006. Estimating log volumes of three tree species in Turkey by six formulae. Forest products journal, 56(11/12), pp.84.

Saeed, M.A. and Abas, K., 2012. Analysis of climate and drought conditions in the Federal Region of Kurdistan. International Scientific Journal Environmental Science, 2.

West, P. W. 2009. Tree and Forest Measurement. (Second edition). Springer-Verlag, Berlin, Australia. 191 pp.

Wiant, H. V., G. B. Wood, and G. M. Furnival., 1992. Estimating log volume using the centroid position. Journal of Forest Science, 38 (1): 187-191.

Wiant, H.V., Jr., D.W. Patterson, C.C. Hassler, G.B. Wood, and J.C. Rennie., 1996. Comparison of formulas for estimating volumes of butt logs of Appalachian hardwoods. Journal of Applied Forestry 13(1): 5-7.

Yavuz, H., 1999. Comparison of the centroid method and four standard formulas for estimating log volumes. Turkish Journal of Agriculture and Forestry, 23(6),pp.597-602.





Agricultural and Environmental Researches