Yogaratnam, N.2021-09-132021-09-132007Journal of the National Institute of Plantation Management, 22(1):p.45-52https://dl.nsf.gov.lk/handle/1/25267AgricultureEco-friendly technologiesAgricultural developmentEnvironmental protectionBiofertilizersNitrogen fixationPhosphate solubilizationPotassium solubilizationBiotechnologyEarth wormOrganic manureLeguminous cropsEco-friendly technologies for sustainable plantation agricultureArticle