(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 2007) Henegedara, G.M.; Senanayaka, M.S.; Aheeyar, M.M.M.; Wickramasinghe, W.D.; Shantha, W.H.A.; Vidanapathirana, R.P.; Hector Kobbekaduwa Agrarian Research and Training Institute