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Item Limitations of a soil water budgeting method in estimating groundwater recharge with particular reference to the dry zone of Sri Lanka(National Science Foundation:Colombo, 2005) De Silva, R.P.Item Analysis of quality and consumer preference for harvested rainwater in Anuradhapura district(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2006) Bandara, M.A.C.S.; De Silva, R.P.; Dayawansa, N.D.K.Item GIS based analysis of biophysical and socio-economic factors for land degradation in Kandaketiya DS division(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2010) Jayarathne, K.D.B.L.; Dayawansa, N.D.K.; De Silva, R.P.