Provisional yield models of Teak (Tectona grandis Linn F.) plantations in northern Ghana

Nunifu, Thompson; Murchison, H.G.

doi:10.1016/s0378-1127(98)00529-5

Cited by 36 publications

(31 citation statements)

References 2 publications

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“…In these studies, height growth estimates did not show any limits (i.e., the SI models were asymptotic). The tree height growth at young ages in Costa Rica was higher than observed in the other studies [42][43][44]. Bermejo et al [42] reported that the anamorphic form of the Hossfeld function was the best model for describing SI for teak growing in Costa Rica.…”

Section: Height Projection Function and Si Classesmentioning

confidence: 72%

Growth and Yield Models for Teak Planted as Living Fences in Coastal Ecuador

Cañadas-López

Andrade-Candell

Domínguez-A

et al. 2018

Forests

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Teak plantations cover a total area of about 4.35 million ha worldwide. The species is currently being planted in silvopastoral systems in the coastal lowlands of Ecuador. However, there are no growth and yield models for teak grown in silvopastoral systems, especially as living fences, in this region. The aim of the present study was to develop volume and yield models for teak grown as living fences in silvopastoral systems. For teak planted as living fences, the biological rotation age was estimated to vary between 15 and 26 years. The final yield in the silvopastoral system varied from 49 m 3 ha −1 at 26 years in the least productive sites to 225 m 3 ha −1 at 15 years in the most productive sites in the study area. The mean annual yield for the highest quality site was 15.3 m 3 ha −1 year −1 at age 15 years, for a density of 160 trees ha −1 . For a base age of 10 years, height-based site indexes of nine to 23 m were established. The growth and yield model obtained may be useful to define the biological (optimal) rotation age and estimate the productivity of teak living fences in the coastal lowlands of Ecuador.

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Section: Height Projection Function and Si Classesmentioning

confidence: 72%

Growth and Yield Models for Teak Planted as Living Fences in Coastal Ecuador

Cañadas-López

Andrade-Candell

Domínguez-A

et al. 2018

Forests

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“…Management practices for T. grandis have been improved in the last decade, however accurate volume equations are not available yet; the only results reported for Costa Rica are those generated by Camacho and Madrigal (1997), and they are limited to DBH < 30 cm (total volume equations) for fixed minimum diameters of 5.0 and 8.0 cm (merchantable volume equations). In other regions and countries, volume equations for teak have been reported by Chakrbarti and Gaharwar (1995) for Karnataka, Madhya Pradesh, West Bengal and another 9 states in India; by Gonzales (1985) for Nueva Vizcaya (Philippines); by Hamzah and Mohamed (1994) for Mata Ayer in Malaysia; by Moret et al (1998) for Venezuela; by Nunifu and Murchinson (1999) for northern Ghana; by Phillips (1995) for Sri Lanka; by Ramnarine (1994) for Trinidad in Tobago; by Sandrasegaran (1969) for north-western Malaya, and by Singh (1981) for Kerala, West Bengal, Madhya Pradesh and another 6 states in India.…”

Section: Merchantable Volume Equationsmentioning

confidence: 91%

“…Present results offer the possibility to modify the dimension, quantity, and distribution of growth in a teak stand according to production purposes. Sandrasegaran (1969) c. Gonzalez (1985) d. Hamzah & Mohamed (1994) e. Phillips (1995) f. Chakrbarti & Gaharwar (1995) g. Nunifu & Murchinson (1999) h. Camacho & Madrigal (1997) i. Moret et al (1998) j.…”

Section: Growth Scenarios (Study Vi)mentioning

confidence: 99%

Stand growth scenarios for Tectona grandis plantations in Costa Rica

Pérez¹

2005

Diss. For.

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Fast-growing, high-yield tree plantations are an increasingly significant source of wood in the tropics. In these areas, improved wood productivity is an important economic goal. In Costa Rica and other countries in Central America, most of the tree plantations, especially those of advanced age, have not had the productivity expected of them. In the general context of a closer relationship between management practices and quality wood production, the general objective of this research was to develop a set of intensive management scenarios that could lead to alternative timber production practices with attainable and promising economic returns.Data for the different studies were collected in different regions of Costa Rica, covering almost all climatic conditions where T. grandis plantations have been established and where the species has adapted well. The study consisted fundamentally of the measurement of growth and yield parameters at the stand level and of the analysis of wood properties at the individual tree level and the interrelationship between silvicultural management and site conditions.High intensity, timely thinnings yielded both individual tree and stand volume, i.e. the objective of high individual tree growth was met without a severe reduction in stand yield. Pruning up to a reasonable height and on time caused no reduction in tree growth and stand yield. Moreover, pruning may improve stem form (higher form factor, lower stem taper) and heartwood content.Important characteristics, such as heartwood content and wood density, were found to be related more to tree age than to silvicultural management practices, especially at early plantation stages.Growth scenarios for 20 and 30 year rotations with the objectives of high individual tree growth and high stand growth were developed for high, medium, and low quality sites. Different site classes, production objectives, rotation periods, and discount rates resulted in marked differences in the financial profitability projections of the developed scenarios. I would like to express my gratitude to Dr. Markku Kanninen, who has believed in this study since the beginning of the journey and has encouraged me on a daily basis and for over five years of hard but unforgettable joint work to make real today's final research product. So many years working under Dr. Kanninen's supervision has brought my knowledge of forest silviculture to levels of understanding far beyond my expectations. Finally, his remarkable leadership of the research project, which this study is part of, has given me an invaluable example of team work, professionalism, and friendship, three fundamental ingredients for success.I am grateful to Dr. Pasi Puttonen and Dr. Lauri Valsta, from which I received unconditional support during these five years of research, especially during my stays in the beautiful country of Finland, where I also collected unforgettable memories and valuable knowledge. Their understanding, guidance, constant encouragement and constructive criticism were essential for th...

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“…With regard to Tectona grandis, (teak), several studies on site index have been performed in countries as diverse as Tanzania (Malende and Temu, 1990), northern Ghana (Nunifu and Murchison, 1999), Costa Rica (Bermejo et al, 2004) and India (Upadhyay et al, 2005). In the state of Tabasco, Mexico, T. grandis is one of the most common plantation species.…”

Section: Introductionmentioning

confidence: 99%

Determinación del índice de sitio de las palnatciones de teca (Tectona grandis L.) en Tabasco, México

Minoche

Aza

Domínguez-Domínguez

et al. 2017

Ciencia e investigación agraria

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The site index has been the predominant method used to evaluate forest stand productivity. Teak is one of the most accepted species within the international timber market due to the physical and aesthetic qualities of this wood. The aim of this study was to determine the site index of teak plantations. The study was conducted in teak plantations of Tabasco. Data were obtained from a network of 10 plantations consisting of 35 plots measured over four successive inventories (2003 to 2006). The data were fitted to five models, of which four were based on proposed finite difference equations and a non-integrated function. The most suitable of the five models was chosen, taking into account the goodness of fit, the residual analysis, and the validation with a data subsample from the plantation. The Sloboda model was finally selected, and the results obtained were compared with the model proposed by Upadhyay. This model proved to be a useful tool, not only in evaluating station quality but also in improving the planning and management of teak plantations in Tabasco.

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Provisional yield models of Teak (Tectona grandis Linn F.) plantations in northern Ghana

Cited by 36 publications

References 2 publications

Growth and Yield Models for Teak Planted as Living Fences in Coastal Ecuador

Growth and Yield Models for Teak Planted as Living Fences in Coastal Ecuador

Stand growth scenarios for Tectona grandis plantations in Costa Rica

Determinación del índice de sitio de las palnatciones de teca (Tectona grandis L.) en Tabasco, México

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