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Forest  Biometry Division


The forest resource is very important resource for any society which needs to be utilized sustainably in order to provide the society better prospects of living. The productivity of the forest may be optimized through appropriate growth & yield studies. The yield of the forests can be increased by adopting the better management practices.  The analysis of the complex interaction between the level of growing stock, timber harvest and tree growth, is the central theme of forest management.

Forest biometrics is a field of study within forest and ecosystem science concerned with the analysis of quantitative problems, the development of quantitative management tools and the application of statistical methods. Forest Biometry includes (i) Data collection methods including Measurement & Mensuration, Remote Sensing, Experiments, Sampling and Inventory for the collection of tree or forest data, or data relating to processes and populations that occur within forests or trees, and (ii) Use of Statistical methods to analyze, summarize and interpret forest data.

Forest mensuration is one of the most fundamental disciplines within forest and related sciences. It deals with the measurement of trees and stands and the analysis of the resultant information. Forest mensuration plays an important role in the practice of forest management. Forest research requires information about the density of forests, diversity, spatial distribution of trees within stands, the size distribution of trees within stands and the expected growth of trees and stands.

For a proper planning of forests, it is necessary to know the growth of individual species under varying conditions of management. The estimation of growth is an essential step in forest management. Any planning for the future involves the prediction of future growth. Sustained Forest Management requires not only the knowledge of the existing stock of a forest but also the knowledge of the yields to be expected in future.


  • Forest measurements and assessment, and modelling trees and stand development to serve as a tool for forest management

Thrust areas

  • Forest mensuration, Biometrics, and growth & yield modelling


  • Growth & yield/productivity studies in natural and planted forests
  • Construction of volume and yield equations for important tree species
  • Development of growth & yield models for important tree species grown in Karnataka
  • Studying the impacts of long-term environmental changes to the growth of trees and productivity of forests
  • Establishment of Forest Observational studies network for growth modeling and to study & analyze ecosystem structure, dynamics and changes

Research highlights

Total and merchantable (variable top-diameter & variable bole-length) volume equations have been developed for teak plantations in Karnataka. Few other models, available in literature for estimating teak volume, were tested but they generally underestimated the volume at dbh > 23 cm. The volume equations developed are more accurate on larger trees (dbh > 15 cm, total height > 12 m) than the smaller trees, and in the plantations having density < 1000 trees ha-1 than in more dense stands, however, the estimated errors for volume in case of smaller trees and plantations of high densities were also within the acceptable limit. General geometric cylinder volume equations combined with a stem form factor of 0.40 were less precise (underestimated volume by 17%) than the models developed and hence a form factor of at least 0.45 should be used for volume estimation using cylinder volume equation.

Heartwood, sapwood and bark content were also estimated in teak plantations. Heartwood volume increases with increasing dbh in teak plantations in Karnataka. Also, bark content decreases with increasing age and dbh but increases with stand density.

Ongoing Projects:

1.     Growth & yield studies on forest plantations of teak in Karnataka for their sustainable management


Power chain saw

Increment borer

Digitech professional caliper

Electronic Clinometer

Vertex laser VL 402

Bark gauge

Research Staff

  1. Mr. M. Srinivasa Rao, IFS, Chief Conservator of Forest and Head

  2. Dr. B.N. Diwakar, Scientist-E

For further information, Please contact:

The Head

Forest Biometry Division

Institute of Wood Science and Technology

P.O. Malleshwaram

Bangalore-560 003 (India)

E-Mail: raoms@icfre.org

Ph: +91-80-22190127;



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  Last Updated on 30-05-2017