Total and Merchantable Volume Equations forTectona grandisLinn. f. Plantations in Karnataka, India

Abstract

Tectona grandis (teak) is one of the most important timber species worldwide and India is one of the major teak growing countries. Though some volume equations were developed in the past in India, merchantable volume equations (any top diameter or bole length) are not available. Moreover, the models developed were neither quantitatively and qualitatively evaluated nor validated with independent data sets. Hence, the objective of this study was to develop appropriate volume equations to predict total tree volume and merchantable volume for teak in Karnataka.Linear and non-linear equations were used to model the relationship of the volume with respect to diameter at breast height (dbh) and total height. Merchantable volume equations for estimating merchantable volume to any minimum top diameter or bole length have also been constructed. The equations tested mostly fitted well to the data. Other models developed elsewhere tended to underestimate the volume, especially at dbh ≥ 23 cm. The geometric cylinder volume equation, in combination with a stem form factor of .40, is widely used for teak in Karnataka but they were found to be less precise compared to regression equations when applied to the

Development of a Stand Density Management Diagram for Teak Forests in Southern India

“…Total stand volume was calculated from a compatible tree volume equation developed by Tewari et al (2013a). Values of stand volume for each plot were estimated considering the top diameter thresholds of 5 cm.…”

Teak (Tectona grandis) silviculture and research: applications for smallholders in Lao PDR

“…Research has provided a better understanding of the growth and management of planted teak forests. Teak growth models and SI equations have been developed and published for several countries (Pérez Cordero & Kanninen 2003b;Bermejo et al 2004;Pérez Cordero 2005;Shamaki et al 2011;Tewari et al 2013;Ugalde Arias 2013;Dieters et al 2014). Further, the benefits of intensive silvicultural management of planted teak have been well-documented.…”

Timber Volume Estimation Model for Commercial Tree Species in the Logging Area Concession of PT. Tunas Timber Lestari in Boven Digul, Papua

“…Informasi potensi tegakan hutan umumnya diperoleh melalui pendugaan volume pohon menggunakan angka bentuk. Namun demikian, metode ini dipandang sudah tidak tepat lagi karena akurasinya yang rendah akibat variasi pertumbuhan pohon yang dipengaruhi oleh perbedaan jenis, tempat tumbuh, dan perlakuan silvikultur (Krisnawati & Bustomi, 2004;Holopainen et al, 2010;Tewari et al, 2013;Kuswandi, 2016;Budiyana et al, 2018). Oleh sebab itu, penggunaan metode yang bersifat umum dalam menduga volume pohon disarankan untuk dihindarkan karena berpotensi menghasilkan informasi yang kurang akurat (Boreel & Siahaya, 2010;Abdurachman, 2013).…”