In 2011-12, sesame accounted for 52% of the area harvested in oil crops, with a further 29% taken by groundnut, 18% by sunflower and 1% by palm oil (CSO, 2012). From 1990-91 to 2011-12, according to CSO data, rubber production was multiplied by ten and yields increased around two fold to 650 kg per ha as old unproductive varieties were replanted with high-yielding varieties (ARDC, 2011). The government has established a 30-year rubber development plan which sets the goal of reaching a production area of 607 000 ha and an annual production of 300 000 MT by 2030. According to the MOAI data, the planted area has grown tremendously in recent years.