BANGLADESH JOURNAL OF FOREST SCIENCE
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
The paper examines the profitability of teak ( tectona grandis, Lin. f) plantations under the existing system of management in Bangladesh. The Forest Department has fixed 69 years as the rotation length for teak on all sites. Land expectation values have been calculated on the basis of the Faustmann formula and preliminary yield tables for three site qualities. They have been calculated on the assumption that the sites would be used for teak plantations for an infinite number of 60 year rotations. The sensitivity of results to changes in the planting and overhead costs and in yields was also calculated. The result indicates positive net returns for sites of qualities I to III under all cost conditions at an eight percent rate of interest. At thirteen percent, sites of qualities I and II show a positive result but those of quality III indicate a net loss Land expectation values are not found to be a convenient index of profita
Studies at the Forest Research Institute show that only teak fruits of 14 mm or above in diameter should be used in nurseries. Smaller fruits produce so few seedlings that their use is not practical.
Smaller fruits usually produce very few seedlings because most them are empty, i. c., they contain no seeds. The presence of empty fruit varies from 15 to 41 percent among the five different localities of Bangladesh. Emptiness explained 78 percent of the variation in germination rates among five diameter classes of fruits.
Low germination rates of the fruits haye been widely reported to be a problem in work with teak reproduction.
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