Kulasooriya, S.A.Hirimburegama, W.K.2021-09-132021-09-131982Journal of the National Science Council of Sri Lanka, 10(2):p.205-212https://dl.nsf.gov.lk/handle/1/25270Chemical technologyBiofertilizersSoil water cultureGrowth and nitrogen fixation in Azolla pinnata under field conditionsArticle