Jayasundara, H.P.S.Tennakoon, N.A.Jayasekara, K.S.2014-06-032014-06-031990Paper presented at the conference of use of organic matter inagriculture in Sri Lanka, Sri Lanka. Bandarawela, 1990:p...https://dl-cri.nsf.gov.lk//handle/1/3392FertilizersOrganic fertilizers