Gaffar, N.M.A.2015-08-052015-08-051999Tea Bulletin, 16(1-2):p.23-27https://dl.nsf.gov.lk/handle/1/19790AgricultureCompostGreen manureOrganic fertilizersMineralsPest controlTea processingMarketingCertificationOrganic farmingOrganic tea cultivationArticle