Monographs
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Item Cost of production of paddy, Yala 1972 in the district of Hambantota, Polonnaruwa, Kurunegala, Kandy and Colombo(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 1973) Izumi, K.; Ranatunga, A.S.; Agrarian Research and Training InstituteItem A study of five settlement schemes prior to irrigation modernization, Vol.1 : Mahawilachchiya scheme(Hector Kobbeduwa Agrarian Research and Training Institute:Colombo, 1979) Abeysekara, W.A.T.; Ranatunga, A.S.; Agrarian Research and Training InstituteItem Economic implications of some agricultural experiments on paddy in Sri Lanka(HARTI:Colombo, 197?) Tenma, T.; Ranatunga, A.S.; Vithanadurage, N.; Agrarian Research and Training Institute