| Issue Date | Title | Author(s) |
| 2018 | Assessment of Potential Removal of Nitrate from Synthetic Medium by Selected Herotrophic Bacteria – An Approach for Reducing Nitrate in Groundwater of Jaffna Peninsula. | Thurairajah, A.; Ratnayake, R.R.; Gnanavelrajah, N. |
| 2014-06-10 | CARBON FRACTIONS AND NUTRIENT STATUS OF SOILS IN IRANAMADHU IRRIGATION COMMAND AREA, KILINOCHCHI | Raguraj, S.; Ratnayake, R.R.; Gnanavelrajah, N. |
| 2014 | CHANGES IN SOIL CARBON UNDER DIFFERENT MANAGEMENT PRACTICES | Ratnayake, R.R.; Kugendren, T.; Gnanavelrajah, N. |
| 2019 | Estimated daily intake and health risk of heavy metals by consumption of nutrient rich cyanobacteria strains isolated from different fresh water bodies of sri lanka | Malika, M.S.; Ratnayake, R.R.; Bowange, R.W.T.M.R.T.K.; Sumanasinghe, A. |
| 2018 | Isolation of fresh water cyanobacteria and screening their potential in nitrate reduction. | Thurairajah, A.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2021 | Nitrate removal potential of newly isolated pseudomonas aeruginosa strain (a22) in a synthetic medium | Abhiramy, K.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2024 | The potential of Nostoc cultivated in parboiled effluent as a biofertilizer for paddy cultivation | Jayasekara, J.M.H.S.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2023 | Potential of Nostoc sp. as a biofertilizer on growth and Yield of paddy- Oryza sativa | Ruwanpathirana, P.S.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2019 | The Potential Use of Cyanobacteria as Biofertilizer for Rice Variety BG-251 | Priyatharshini, B.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2019 | The potential use of cyanobacteria as biofertilizer for rice variety BG-251 | Priyatharshini, B.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2018 | Screening of Denitrifying Bacteria towards Removal of Nitrate from Ground water. | Thurairajah, A.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2022-06 | Screening of potential aerobic denitrifying bacteria for nitrate removal from water | Kirisan, A.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2022 | Soil Carbon Sequestration Potential of Dry-Zone Home Gardens in Anuradhapura District, Sri Lanka | Premalal, H.M.N.D.; Perera, G.A.D.; Ratnayake, R.R. |
| 2020 | Spatial Variability of Soil Carbon and Its Relationship with Nutrient Availability in Paddy Soils of Trincomalee District, Sri Lanka | Chathuranga, D.M.B.A.; Paranavithana, T.M.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2020 | Spatial Variability of Soil Carbon and Its Relationship with Nutrient Availability in Paddy Soils of Trincomalee District, Sri Lanka. | Chathuranga, D.M.B.A.; Paranavithana, T.M.; Gnanavelrajah, N.; Ratnayake, R.R. |
| 2017 | A study on potential use of cyanobacteria isolated from fresh water bodies of sri lanka in agriculture | Ramziya, A.; Gnanavelrajah, N.; Fuad Hossain, M.D.; Kumara, K.L.W.; Ratnayake, R.R. |
| 2017 | A Study on Potential Use of Cyanobacteria Isolated from Fresh Water Bodies of Sri Lanka in Agriculture | Ramziya, A.; Fuad Hossain; Ratnayake, R.R.; Gnanavelrajah, N.; Kumara, K.L.W. |
