Changes

Data from the early 20th Century indicate a yield of 0.6 kg/tap with tapping every 2-3 months. This means that the annual yield is 2.4-3.6 kg/tree probably for fairly young trees of 25-30 years. In the Krui area, the average annual yield of mature trees over 60 years old is 15.6 kg/tree. Some big trees of 60-80 cm in diameter yield 4-5 kg monthly. The resin production of flowering and fruiting trees decreases by about 25% for 2 months, after which it gradually increases to the previous levels.

== Handling after harvest ==