Rathnayake, W.M.U.K.Sirisena, D.N.Renuka, K.A.De Silva, S.Piumika, A.M.Atapattu, A.M.R.S.2021-07-192021-07-192019Annals of the Sri Lanka Department of Agriculture, 21:p.21https://dl-doa.nsf.gov.lk/handle/1/3267RiceSoil chemical propertiesSpatial variationPolonnaruwaSpatial variation of soil properties in paddy fields of Polonnaruwa districtArticle