Kulasooriya, S.A.2021-09-132021-09-131996Cyanobacterial Biotechnology:p.201-209https://dl.nsf.gov.lk/handle/1/25269AgricultureBiofertilizersCyanobacteriaAzollaNitrogen fixationSoil fertilityBlue green algaeRiceCyanobacteria and Azolla as biofertilizer for riceBook Chapter