De Silva, M.A.T.Balakrishnamurthi, T.S.Abeywardena, V.2014-12-162014-12-161970Journal of the Soil Science Society of Ceylon, 1:p.97-112https://dl.nsf.gov.lk/handle/1/16287AgricultureSoilsSoil analysisNPK fertilizersMagnesium deficiencyFertilizer requirements of the coconut palmArticle