The main rubber production is latex
which flows from latex vessels in the bark
surrounding the trunk. Tapping of rubber tree
starts in the fifth to seventh year after
planting and then continues for 25-30 years.
After 30 years, a decline in latex p.roduction
make further tapping of the tree uneconomic.
(18) ln general practice, when the trunk has
about 50 cm circumference at 150 cm above
ground is appropriate time to start tapping.
(6) ln the past, after cutting the old rubber
plant, they were burnt for preparing of
replanting. Nowadays, the rubber timber was
required for furniture industry. Both of the
latex tapping and rubber wood production
affect nutrient depletion in planting area by
crop removal.