innovation,receptivity and adoption in rubber smallholdings of Sri lanka Jayasena, W. G creator Herath, H. M. G Colombo Agrarian Research and Training Institute 1986 1986 xvi,172p. 29cm Agriculture and related technologies Rubber tree Rubber- producing and resin-producing plants Crops grown for other industrial purposes Other crops grown for industrial processing Field and plantation crops Field and plantation crops 633.89528 JAY