Kulasooriya, S.A.2021-09-132021-09-131990Nitrogen Fixation:Proceedings of the 5th International Symposium on N2 fixation with Non-Legumes:p.473-479https://dl.nsf.gov.lk/handle/1/25278AgricultureAzollaBiofertilizersRice productionWater availabilityPhosphorus fertilizersPlant protectionConstraints for the widespread use of Azolla in rice productionConference Paper