2024-08-222024-08-222024https://hdl.handle.net/10883/34667CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purposeAGRICULTURAL SCIENCES AND BIOTECHNOLOGYArticle10.18845/rfmk.v21i49.7255Volume of Standing TreesSmalian MethodEucalyptus species are widely cultivated in Brazil due to their high productivity, relatively short rotation cycle, and the variety of products they offer. The estimation of tree volume is commonly done using the artificial form factor (real volume / cylinder volume). However, this method may result in inaccurate and biased estimates, leading to incorrect decisions in plantation management. This study describes a flexible form factor and some considerations for its implementation for different species. The Smalian method was used to determine the real volumes in 2198 Eucalyptus trees. The artificial form factor and the flexible form factor of Silva, Borders and Brister were estimated with their proportionality constants determined using probability density functions. The artificial form factor, estimated at 0.53, produced inaccurate and biased volume estimates, whereas the flexible form factor, with a constant of 0.55, produced accurate and unbiased estimates.TREESVOLUMEEUCALYPTUSOpen AccessSustainable Agrifood Systems