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Item Water use in ancient era(National Science Foundation. Colombo, 2013) Dharmasena, P.B.Item Productivity of rice and chilli under village tanks of Sri Lanka in Maha season with respect to resource utilization(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1997) Karurasena, K.G.J.; Marambe, B.; Sangakkara, U.R.; Dharmasena, P.B.Item Present use of land and water resources in village tank farming(Sri Lanka Soil Science Society of Sri Lanka:Peradeniya, 1991) Dharmasena, P.B.