Volume Prediction Equations for Eucalyptus Hybrid in Punjab

Eucalyptus hybrid is an important tree for social and agro-forestry plantations in Punjab. Data from 111 felled trees ranging in diameter from 7.1 cm to 55.7 cm and height from 10.0 m to 36.4 m has been analysed to predict total wood volume over bark upto 5 cm thin end diameter. The paper concludes that Logarithmic model (with two variables , diameter and height) gives the best fit. The technique helps in stabilizing the variance and the model conforms to the theory of least squares. Results show that in Punjab , as compared to Chaturvedi's equations , the volume produced is slightly higher due to initial irrigation at the time of establishment.