TEAK PLANTATIONS IN NILAMBUR - Kerala Forest Research Institute

Table : 3.9
Distribution of area of teak plantations in Nilambur Divisions based on known site quality
Type of
Percentage in different site qualities based on top height
* Figures in parenthesis denote distribution based on number of plantations
Computed from Ranganathan (1981), Vasudevan (1971) and Appendix : 7
Table 3.10 relates to the same set of plantations as in Table 3.9 but gives the
percentage distribution according to different site qualities based on actual
yield obtained. Naturally, yields corresponding to the site quality given in the
working plan are to be expected. It can be seen that when the actual yield is
considered, the corresponding site quality distribution is skewed towards the
site quality classes III/IV and IV.
The lowest site quality class is IV.
However, a substantial percentage of plantations has recorded yields lower
than that of site quality IV. Yields which are lower than that expected for site
quality IV are therefore indicated hereafter as ‘failure’.
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