The physical and chemical properties of soils under rubber plots of 1, 7, 11, 14 and 18 years of age were analysed and compared in order to examine the trend of change in the properties of soils under rubber over time. Changes in soil bulk density and total porosity during the first 18 years of rubber plantation establishment were slight. There was no significant increase in soil organic carbon and total nitrogen contents over time. Soil exchangeable calcium and magnesium declined in the 0–10 cm and 10–30 cm layers of the soils with increasing age of rubber plantation. Decline in the levels of exchangeable potassium was, however, confined to the top 10 cm of the soil profiles. Most of the observed decline in soil mineral-nutrients occurred during the first 11 years following rubber plantation establishment.