Impact of the input subsidy scheme, introduced by the Rubber Board in 1986-87 on cultural practices of smallholdings was analysed, based on a multi-stage selective random sampling survey covering 5 regions and 207 memeber growers attached to 25 rubber produers societies. Wide inter-regional variations on account of region-specific factors were evident. Lack of awareness about improved techniques and resources were the main constraints during the prescheme period. All the thirteen subsidised inputs were availed of only in one region. Among the inputs chemical fertilizers was the most popular. Although the net impact of the scheme on yield could not be assessed, the study has identified the pattern of changes in the cultural practices. The net cost saving on account of a shift in favour of straight fertilizers during the post-scheme period was Rs. 326 per hectare. The additional mandays generated during 1988-89 was 34.19 and estimated subsidy was Rs. 681.87 per hectare. Constraints in the application of subsidised inputs were identified and need for extension services in selected cases outlined.