[Objective]The aim of the present research work was to study the effects of interplanting banana and pueraria with young rubber on the soil fertility and enzyme activity.[Method]Banana and pueraria were planted between two rows of rubber trees (planted during July-August 2006) in April 2008. The samples from rubber plantation soils were collected 7 times from July 2008 to January 2010 in order to analyze the nutrient contents and enzyme activity of soils. The soils, which have not been interplanted, were ta...