Soil Science Division

• Long term effects of P application on soil P content and grain yield of rice

• Long term effects of application of organic manure  and  chemical fertilizer to rice fields (IPNS)

• Nitrogen response of elite breeding lines

• Long term  effect of  K fertilizer on soil and plant K content  in rice cultivation

• Maintenance of rice fields without application of chemical fertilizer or organic manure

• Soil and plant test kits-based fertilizer recommendation

• Development of eco-friendly farming technologies to minimize inorganic fertilizer usage while maintaining adequate productivity and improving soil fertility (NRC Project with UOP and RRDI)

• Spatial distribution of mineral elements and metalloids in rice fields, and Its’ relationship with the productivity and quality of rice grains in Sri Lanka (AHEAD Project: DOA-UOP)

• Fertilizer recommendation for ultra-short aged rice varieties

• Evaluation of new fertilizer products from different companies

• Effect of sulfur and magnesium on grain yield of rice grown in soils of LCIZ

• Use of coated urea to reduce present N dosage  in rice production

• Evaluation of biofilm bio fertilizer (BFBF) on growth and yield of paddy cultivation

• Seed production of selected traditional varieties under organic conditions

• Abeysekara , A.S.K , W.M.J. Bandara and U.B. Wickrama.2001. Effect of continuous application  of glyphosate and paraquat on weed controlling efficacy, phytotoxicity and yield of wet seed rice. Proceeding of the 18th Asian Pacific Weed Sci. Soc.Conf. May28-June 2,2001, Beijing-China. pp233-238 

• Aluwihare Y C,,M. Ishan, M. D. M. Chamikara, C. K. Weebadde, D. N. Sirisena, W. L. G. Samarasinghe, S. D. S. S. Sooriyapathirana 2016. Characterization and selection of phosphorus deficiency Tolerant rice genotypes in Sri Lanka. Rice Science, 2016, 23(4): 184-195 

• Bandara W.M.J. and  G.A Gunathilaka, .E. Pieris and D.S.Abeysiriwardana.1987. Simulation of potential production  of rice in LCWZ of Sri Lanka. Case study in crop growth simulation, IRRI-CABO-TPE Netherlands Chapter 7.pp1-34

• Bandara WMJ, D. Kumaragamage,  WMADB Wickramasinghe,  2009,  Potassium Site Specific Management to increase rice yields in three rice soil series in Sri Lanka., Proceedings of 9^th ESAFS Conference, 27-30 September 2009, Seoul, Korea

• Bandara WMJ, W.M.A.D.B. Wickramasinghe and D.N. Sirisena   2003, Potassium fertilization of paddy in Sri Lanka in Proceedings of the IPI-NFS International Workshop on Importance of Potassium Fertilizer for Sustainable Production of Plantation and Food crops in Sri Lanka. Ed VV Nossov and JDH Wijewardena (pp143- 160). International Potash Institute, P.O. Box 569, CH-8810 Horgen Switzerland,

• Bandara, W M J , D N Sirisena 2010. Soil Fertility management in rice soils. Proceeding of the Rice Congress 2010, PGRC, Gannoruwa  in Press.

• Bandara, W M J, 2012. Nutrient Management in Rice Farming in  Sri Lanka Proceeding of the International  conference on soil fertility management, IPNI- PGIA, Peradeniya Sri lanka, December 03, 2012 in Press

• Bandara, W.M.J,2006. A site-specific fertilizer recommendation for rice (Oryza sativa L.) using a systematic approach to soil fertility evaluation. Ph. D. Thesis submitted to the Post Graduate Institute of Agriculture, University of Peradeniya, Sri Lanka, November, 2006

• Bandara, W.M.J. 2001. Methods of Zn application to rice crop. DINAMINA newspaper 28.07.2000

• Bandara, W.M.J. and G.A Gunathilaka. 1984. Effect of applied K on bronzing in rice. KRUSHI, Quarterly  Technical Bulletin, DOA, Peradeniya Vol 6. No.3 29-33

• Bandara, W.M.J. and G.A Gunathilaka. 1986 Effect of iron toxicity on rice cultivation . Project terminal report, Grant no, RG/4/AG/3, NARESA, Sri Lanka.

• Bandara, W.M.J. and G.A Gunathilaka. 1997. Effect of some soil amendments on bronzing in rice grown in iron toxic soils of LCWZ. KRUSHI, Quarterly  Technical Bulletin, DOA, Peradeniya Vol. 12 No.1 22-29  

• Bandara, W.M.J., 2007 Role of micronutrients in balanced nutrient application for rice in dry and intermediate zones of Sri lanka:  J. Soil Sci. Soc, of Sri Lanka 19: 35-49

• Bandara, W.M.J., and G.A Gunathilaka  1994.  Effect of applied P and K on bronzing in rice grown in iron toxic organic soils. Rice  and problem soils of south and  Southeast Asia. IRRI, Philippines pp 176 -186

• Bandara, W.M.J., and G.A Gunathilaka  1994. Effect of applied K and P on bronzing in rice grown in iron toxic mineral soils. J.Nat.Sc.Cou. Sri Lanka. 1994 22(3): 219-230

• Bandara, W.M.J., and G.A Gunathilaka  1994. Effect of iron toxicity on growth , photosynthesis and dry matter production of rice. Rice  and problem soils of south and  Southeast Asia. IRRI, Philippines pp 166-175. . 

• Bandara, W.M.J., and S.B.A . Weerawarna, 2009.  Integrated Plant Nutrient management of rice   Proceeding of the 9^th  Conference of East and Southeast Asian Federation of Soil Science, Soul,S/ Korea, Sep.. 22-23, 2009

• Bandara, W.M.J., D.Kumaragamage, D.B.Wickramasinghe and S.B.A . Weerawarna, 2007  New approach to supply balanced nutrient requirement for rice grown in galwewa soil series in Low country Dry Zone of Sri Lanka. Proceeding of the 8^thConference of East and Southeast Asian Federation of Soil Science, Tsukuba, Japan, Oct. 22-23, 2007

• Bandara, W.M.J., D.Kumaragamage, D.B.Wickramasinghe and S.B.A . Weerawarna, 2007  a New technique ‘Biological Soil Test Kit’ for identification of nutrient deficiencies and testing soil specific fertilizer recommendation for rice Proceeding of the 8^th Conference of East and Southeast Asian Federation of Soil Science, Tsukuba, Japan, Oct. 22-23, 2007

• Bandara, W.M.J.2001. Zinc recommendation to rice crop. AGTEC in Brief, Technical newsletter, DOA,2001.

• Bandara,W.M.J 2006 A site specific fertilizer recommendation for rice (Oryza sativa L.) using a systematic approach to soil fertility evaluation Ph.D Thesis, Post Graduate Institute of Agriculture, University of Peradeniya. November 2006

• Bandara,W.M.J 2007. Micronutrient analysis in soils. In Methods of soil analysis, Laboratory Soil Analytical Manual Published by Soil Science Society of Sri Lanka, PO Box No. 10, Peradeniya

• Bandara,W.M.J and L.C. Silva 2000.  An assessment of micronutrient requirement for rice grown in LHG soils of low country dry zone. Annals of the Sri Lanka department of agriculture,2000, 35-46

• Bandara,W.M.J and L.C. Silva 2000.  Effects of applied micronutrients on growth and    grain yields of rice grown in LHG soils of low country intermediate zone. J. Soil Sci. Soc, of Sri Lanka, 2000, 12:40-50

• Bandara,W.M.J and L.C. Silva 2001. Rice crop response to zinc application in LHG soils  of low country intermediate zone. Annals of the Sri Lanka department of agriculture , 2001 3:9-18

• Bandara,W.M.J, D.Kumaragamage and  D.B.Wickramasinghe. 2007 Formulating soil specific fertilizer recommendations for rice. Project Terminal Report. CARP project No. 12/504/377 .Council for Agricultural Research Policy, 9/114, Wijerama Mawatha, Colombo 07

• Bandara,W.M.J, D.Kumaragamage, D.B.Wickramasinghe and S.B.A.Weerawarna. 2006. A  Site specific fertilizer recommendation for rice grown in imperfectly drained Reddish Brown Earth soils in Low Country Dry  Zone of Sri Lanka. Tropical Agric. Res.  18: 48-62

• Bandara,W.M.J, S W Abeysekara,S N Jayawardana and S.B.A.Weerawarna. 2009. Response of newly developed hybrid rice variety Bg 407H to Zinc,Sulfur nd Magnesium in Kurunegala soil series  in Low Country Intermediate Zone. J. Soil Sci. Soc, of Sri Lanka 19: 39-46

• Bandara,W.M.J, S.Zartaj,R.S Hafeel and S.B.A.Weerawarna. 2011. Effect of applied potassium on grain quality of rice grown in Kurunegala soil series  in Low Country Intermediate Zone. Proceeding of the International  Conference on potassium food quality at hotel Topaz, Kandy, Sri lanka, Oct. 22-23, 2011

• Bandara,W.M.J. 1995.Crop cultivation in Low lying lands in Low country wetzone. Research  seminar series, RARDC, Dept. of Agriculture, Bombuwela. pp 1-3.

• Bandara,W.M.J. 2001. Zinc application to rice cultivation. DIVAYINA  newspaper krushi sangrahaya.28 July 2001.

• Bandara,W.M.J. 2005 Nutrient requirements and identification of nutrient deficiencies in rice cultivation Technical bulletin No.4 Published by Soil science society of Sri Lanka.

• Bandara,W.M.J., and J.D.H.Wijewardana 2003 Soil problems and remedies related to rice production. Vidusara Science magazine Vol. 16 November, 2003 pp 30 

• Bandara,W.M.J., S.B.A.Weerawarna and V.R.B. Udagaladeniya Menike  2006. Contribution of micronutrients in organic manures for growth and grain yield of rice grown in Batalagoda soil series of low country intermediate Annals of the Sri Lanka department of agriculture , 2006 8: 19-28

• Bandara,W.M.J., W.M.A.D.B.Wickrasinghe and L.C.Silva 2004 Effect of applied P on Zn Availability , growth and grain yield of rice grown in low humic gley soils of low country Intermediate zone. Annals of the Sri Lanka department of agriculture , 2004 6: 39-48

• Bandara,WMJ, and  DB.Wickramasinghe. 2007. Identification of nutrient deficiencies in rice soils and fertilizer recommendation for rice. Biological Soil  Test Kit. Technical Circular, Rice Research & Development Institute, Batalagoda, Department of Agriculture and Ministry of Agriculture and Agrarian Service.

• Bandara,WMJ, D Kumaragamage, DB.Wickramasinghe and SBA Weerawarna. 2005.  Site specific nutrient management strategy to increase rice yields in Low Country Intermediate Zone. J. Soil Sci. Soc, of Sri Lanka 17: 32-43.

• Bandara,WMJ, D.Kumaragamage and  DB.Wickramasinghe.2007 Formulating site specific fertilizer recommendations for rice. Project Terminal Report. CARP project No. 12/504/377, Council for Agricultural Research Policy, 9/114, Wijerama Mawatha, Colombo 07.

• Bandara,WMJ, D.Kumaragamage, DB.Wickramasinghe and SBA Weerawarna. 2006. A Site specific fertilizer recommendation for rice grown in imperfectly drained Reddish Brown Earth soils in Low Country Dry Zone of Sri Lanka. Tropical Agric. Res.  18: 48-62.

• Bandara,WMJ, WMADB.Wickrasinghe and  DN.Sirisena 2003 Potassium fertilization to paddy soils in Sri Lanka Proceedings of the IPI-NFS International Workshop  on importance of potash fertilizers for sustainable production of plantation and food crops in Sri Lanka 1-2 December 2003, Galadari Hotel Colombo.

• Bandara,WMJ, WMADB.Wickrasinghe, D.N.Sirisena  and JDH Wijewardana, 2003.Response of rice  to applied potassium in soils of Sri Lanka. Proceedings of the workshop on ‘use of P and K fertilizers in Sri Lankan agriculture’ organized by PGIA,SSSSL and Potash and Phosphate Institute of Canada, 10-11 July,2003 p10.

• Bandara,WMJ, WMADB.Wickrasinghe, DN.Sirisena  and LC Silva, 2003. Effect of applied Zn on N use efficiency, growth and grain yield of rice grown in LHG soils of LCIZ. Annals of the Sri Lanka Department of Agriculture,(Vol 5):23-32. 

• Boniface D Peiris, W.Wickramasinghe and P Munasinghre, 1998. Effect of Potassium on some grain characteristics of rice, In Proceedings of the National Symposium on Future Goals of Physiological Research for the Improvement of Plant Resources, December 18 –20, 1998, Indian Society of Plant Physiology, New Delhi, India.

• D. N. Sirisena, W. M. N. Wanninayake, S. S. S. Weralugolla and A G .S. D. Silva, 2016.  Assessment of most popular three months age rice varieties for Zinc (Zn) accumulation in brown rice. Annual of the Sri Lanka Department of Agriculture 18: 144 – 148  

• Dilani, P.V.D., C.M Nanayakkara. and D.N Sirisena,. (2016). Trichoderma virens mediated rock phosphate solubilization: A potential replacement for triple super phosphate in rice cultivation, Proceedings of the 21

^st International Forestry and Environment symposium, pg. 105.

• Dissanayake DMN and WMADB Wickramasinghe, 1999. Effect of N, P and K application on the occurrence and the severity of narrow brown leaf spot in different rice varieties. ASDA Annals of the Sri Lanka Department of agriculture, Peradeniya. Vol. 1, 1999. 267 –276.

• Dissanayake, G.L.S.A., Rathnayake, W.M.U.K., Amarasekara, M.G.T.S., 2012. Variation of soil properties of lowland rainfed and irrigated paddy farming in low country intermediate zone.  Proceedings of the undergraduate research symposium 2012. Faculty of Agriculture, Rajarata University of Sri lanka. 62p

• Elke, Mattthiasa Wissawa, Terry Rose, Ibnou Dieng, Khady N Drame, Mamadou Fofana, Kalimuthu Senthilkamar Ramaiah Venuprasad, Demba Jallow, Zacharie Segda, Lalith Suriyagoda, Dinaratne Sirisena, Yochiro Kato, Kazuki Saito, 2016. Genotypic variation in grain P loading across diverse rice growing environments and Implication for field P balances. frontiers in Plant Science. doi:103389/fpls 2016/01435. 1- 14 

•  G S N Perera, D N Sirisena and D M S Duminda. 2011. Potassium split application in irrigated rice on rice straw added red yellow podzolic soils. Proceedigns of the Undergarduate Research symposium 2011. Faculty of Agriculture , Rajarata university of Sri Lanka. 16.  September 2011. 

• Gallage, P. N., C. M Nanayakkara,. and D. N Sirisena, (2015). Rice rhizophere manipulation with Trichoderma virens for effective phosphorous management. Abstract. Proceedings of 35^th Annual Sessions of Institute of Biology. Pg. 67.

• Gunarathne, A., N Sirisena,., U.K Rathnayake,., J Rathnayake,., X Kong,., L.P Vidhanaarachchi,., and H Corke,. 2011. Effect of fertilizer on functional properties of flour from four rice varieties grown in Sri Lanka. Journal of the Science of Food and Agriculture, 91: 1271-1276. Doi:10.1002/jsfa.4310

• Gunarathne, A., Sirisena, N., Rathnayake, U.K.,Rathnayake, J., Kong, X., Vidhanaarachchi, L.P., and Corke, H. 2011. Effect of fertilizer on functional properties of flour from four rice varieties grown in Sri Lanka. Journal of the Science of Food and Agriculture, 91: 1271-1276. doi:10.1002/jsfa.4310

•  Hafeel, R F., T V S C Jayasekara, E M R D Edirisnghe, and D N Sirisena. 2008. Variety diffrences in grain quality attributes of rice. Annals of Sri Lanka Department of  Agriculture 10: 323 – 328. 

• Herath, H.M.K.V, Gunawardena E.R.N., and Wickramasinghe W.M.A.D.B. 2013 The Impact of “Kethata Aruna” Fertilizer Subsidy Programme on Fertilizer Use and Paddy Production in Sri Lanka Potassium status of rice growing soils in Sri Lanka, Tropical Agricultural Research Vol. 25 (1): 14 – 26 (2013). 

• K.A.T.N. Somaweera, L.D.B. Suriyagoda, D.N. Sirisena & W.A.J.M. De Costa. 2016. Growth, Root Adaptations, Phosphorus and Potassium Nutrition of Rice When Grown Under the Co-Limitations of Phosphorus, Potassium and Moisture. Journal of Plant Nutrition 10.1080/01904167.2016.1201497

•  Kumari, H M P S, D N Sirisena, P V Hemachandra, UND Silva, E M A S  Ekanayake, and I W M K N K Yatawara. 2008. Production of salt tolerant rice  breeding lines through doubled haploid anther culture technique. Annals of Sri  Lanka Department of Agriculture. 10: 347.

• L.D.B. Suriyagoda & D.N. Sirisena & K.A.T.N. Somaweera & A. Dissanayake & W.A.J.M. De Costa & H. Lambers. 2016. Incorporation of dolomite reduces iron toxicity, enhances Growth and yield, and improves phosphorus and potassium Nutrition in lowland rice (Oryza sativa L) Plant Soil 2016. 10.1007/s11104-016-3012-0.

• Mapa Ranjith B., INP Jayawardane and WMUK Rathnayake, 2008. Mapping of soil texture and depth to hardpan in the command area of Girithale irrigation scheme, The fifth National Symposium on Geo-Informatics, Geo-Informatics Society of Sri Lanka, Pp 55-60.

• Nayanaka VGD, Ranjith B Mapa, and Rathnayake, W.M.U.K., 2009. Use of GIS for mapping soil texture and organic matter of rice soils of Pulasthigama in Pollonnaruwa district. The sixth National Symposium on Geo-Informatics, Geo-Informatics Society of Sri Lanka, Pp 33-39.

• Pathirana, W.P.C.N, Wickramasinghe, W.M.A.D.B, Jinadasa, D.M,2007, Evaluation of Eppawala Single Super Phosphate (ESSP) as a Source of Sulphur Fertilizer for Rice, Abstract of Final Year Research Symposium 2007, Faculty of Agriculture, Rajarata University of Sri Lanka. http://repository.rjt.ac.lk/7013/325

• Perara. BMK, MP Dhanapala, DB. Wickramasinghe, CA Fazekas de St. Groth and R Wetselaar.1988. Agronomic aspects rice yield gap between farmer and researcher in the North Central Dry Zone of Sri Lanka In Rice Production in Sri Lanka, A combined Agronomic / Economic Study in the Intermediate and Dry Zone of Sri Lanka, ACIAR Technical Reports No.17.

• Rameeza R, D N Sirisena, W LG Samarasinghe, P Samaraweera, AGMLK Dayanande, HAM Wickramasinghe, and ADSS Sooriyapahirana 2011. Validation of Known Randomly Amplified Polymorphic D N A Markers for molecular Breding of salt tolerance rice varities in Sri Lanka.. Proceedings of the Paradeniya university research Sessions ( PURSE) 2011. 16: 191-192.  26^th November 2011. Faculty of Veterinary medicine and Animal science  

• Rathnayake W.M.U.K., R.P. De Silva., Dayawansa N.D.K., 2015. Variability of some Important Soil Chemical Properties of Rainfed Low Land Paddy Fields and its Effect on Land Suitability for Rice Cultivation. Tropical Agricultural Research Vol.26 (3): 506-516, Post graduate Institute of Peradeniya, University of Sri Lanka.

• Rathnayake WMUK, DN Sirisena, KA Renuka and S de Silva, 2017. Determination of spatial variability of soil phosphorous for efficient utilization of phosphorous fertilizer in paddy cultivation in polonnaruwa district in Sri Lanka, 13^th Conference of East and southeast Asian Federation of Soil Science, Pathaya, Thailand

• Rathnayake WMUK, DN Sirisena, KA Renuka, WMN Wanninayake and S de Silva, 2018. Spatial variability of available soil phosphorous of paddy fields at four major rice producing districtsin Sri Lanka, 5^th International Rice Congress, Singapore

• Rathnayake, W.M.U.K., Nayanake, V.G.D., Sirisena, D.N., Mapa, R.B., Atapattu, A.M.K.B., and Wickramasinghe, W.M.A.D.B. 2009. Variability of major soil chemical properties and their suitability for rice cultivation at Pulasthigama farmer fields in Sri Lanka. 9^th Conference of East and southeast Asian Federation of Soil Science, 27-30^th October 2009, Olympic Parktel Hotel, Seoul, Korea

• Rathnayake, W.M.U.K., Sirisena DN, Renuka KA, De Silva S., Piumika AM, Atapattu AMRS. 2019. Spatial variation of soil chemical properties in paddy fields of kurunegala district in Sri Lanka.  Proceedings of the 14^thESAFS International Symposium 3-7; Nov, 2019. Thaiwan

• Rathnayake, W.M.U.K., Sirisena DN, Renuka KA, De Silva S., Piumika AM, Atapattu AMRS. 2019. Spatial variation in some soil properties in paddy fields of polonnaruwa district. Annals of the Sri Lanka Department of Agriculture, 2019. Vol.20

• Rathnayake, W.M.U.K., Sirisena DN, Wanninayake WMN. 2014. Feasibility of the utilization of thematic maps in efficient management of P & K fertilizers in paddy fields of Puttalam District. Annals of the Sri Lanka Department of Agriculture, 2014. Vol.16: pp127

• Rathnayake, W.M.U.K., Sirisena DN, Wanninayake WMN. 2015. Assessment of temporal variation of soil salinity in paddy fields in Puttalam District. Annals of the Sri Lanka Department of Agriculture, 2015. Vol.17: pp 124

• Rathnayake, W.M.U.K., Sirisena, D.N., Bandara,W.M.J., and Wickramasinghe, W.M.A.D.B. 2008. Suitability Classification of some important Soil Fertility Parameters of Paddy Fields in Kurunegala District, Journal of Soil Science Society of Sri Lanka, Vol.20. Pp 25 – 30

•  Sirisena D N, K V K K Sumanapala, and W M N Waninayake 2012. 2 Use of Leaf colour chart and SPAD meters to estimate total nitrogen content in rice (Oryza sativa) plants. Annuals of the Sri Lanka Department of Agriculture  14: 313-314

• Sirisena D N, WMADB Wickramasinghe, H M A B Herath and H M L Jinadarie Lanka. 2006. Performance of rice varieties at high and low rates of fertilizer application. Annals of Sri Lanka Department of Agriculture, Vol 8: 397 – 399.

• Sirisena D N, WMN Wanninayake, and AGS De Silva, 2015. Potassium dynamics in irrigated low land paddy soils and its relation to plant K and grain yield of rice. Tropical Agriculturist, 163:  89-99 pp

• Sirisena D N., W. M. U. K. Rathnayake and H. M. E. Herath WMADB Wickramasinghe, K B Atapattu. 2011. Productivity improvement of marginal paddy lands in Polonnaruwa district, Sri Lanka. Proceedings of the 10^th International conference of the east and south East Asian federation of soil science societies. October 10-13 Cinnamon Lake Side Hotel, Colombo, Sri Lanka 13 – 15 pp

• Sirisena D.N, Rathnayake, W.M.U.K., Bandara W.M.J. (2010).  Availability and spatial variability of plant nutrients in paddy fields of wilgoda irrigation scheme in Kurunegala In: Evans, A.; Jinapala, K. (Eds.). Proceedings of the National Conference on Water, Food Security and Climate Change in Sri Lanka, BMICH, Colombo, Sri Lanka, 9-11 June 2009. Vol.2: Water quality, environment and climate change. Colombo, Sri Lanka: pp 61-68International Water Management Institute.

• Sirisena D.N., Rathnayake W.M.U.K., Atapattu K.B., Herath H.M.A.B., 2011. Productivity improvement of saline rice lands in Polonnaruwa district.  Annals of the Sri Lanka Department of Agriculture, 2011. Vol.13. 113-124 pp.

• Sirisena D.N., W. M. U. K. Rathnayake and H. M. E. Herath. 2010. Productivity Enhancement of saline paddy soils in Angiththamkulamayaya, Sri Lanka: a case study. Pedologist. 53: (No 3) 96-100.

• Sirisena DN , D M N Dissanayake, K A T N Somaweera, V Karunaratne, and N kottegoda. 2012 Use of Nano K fertilizer as source of potassium in rice cultivation. First national nanotechnology conference. 24-25 August, 2012. Mount lavinia Hotel Colombo. 98-99 

• Sirisena DN , WMADB Wickramasinghe, RAND Ranatunge, 2006, Use of leaf colour charts to determine nitrogen requirements and yield response of rice varieties. Annals of Sri Lanka Department of Agriculture, Vol 8: 222-239.

• Sirisena DN and WMADB Wickramasinghe, 2001 Recovery of Fertilizer N applied to wetland paddy soils. ASDA Annals of the Sri Lanka Department of Agriculture, Peradeniya. Vol. 3:  231 – 236.

• Sirisena DN and WMADB Wickramasinghe. 2007, Sustainable rice production from marginal rice lands of Sri Lanka.  Poster presented at the 8^th ESAFS International Symposium. October 21-25^th 2007. International Congress Center, Tsukuba, Japan.

•  Sirisena DN, D M N Dissanayake, K A T N Somaweera, V Karunaratne, and N kottegoda 2013. Use of Nano K fertilizer as source of potassium in rice cultivation. Annuals of the Sri Lanka Department of Agriculture 14: 313-314

• Sirisena DN, DB Wickramasinghe, WMW Weerakoon, ST Bandara and D. Kumaragamage, 2001, Nitrogen Availability of organic manure and its use as a source of nitrogen in wet land rice cultivation Journal of Soil Science.13: 40-46.

• Sirisena DN, HMBA Herath 2012 : Response of rice to application of K fertilizer in low country dry and intermediate zones of Sri Lanka. International symposium on Agriculture and Environment, 29, November 2012. 219-222 

• Sirisena DN, R F Hafeel, WMADB Wickramasinghe and K LL Chandrakumari 2005. Effect of nitrogen on 1000 grain weight and grain filling of rice. Journal of Soil Science Soc. of Sri Lanka. 17: 53- 58.

• Sirisena DN, Rathnayake, W.M.U.K., Wanninayake WMN. 2014. Identification of saline paddy fields in Puttalam district.  Proceedings of the International Symposium on Agriculture & Environment, 2014.  Faculty of Agriculture, University of Ruhuna, Sri Lanka. Pp 135-138.

• Sirisena DN, WMADB Wickramasinghe, 2005. Efficient management of nitrogen in wetland rice cultivation of Sri Lanka. The 7^th ESAFS International Conference, International Symposium on Sustainability of paddy farming systems.  June 1-5 2005, Bureau of Soils and Water Management, Quezon City, Philippines.

• Sirisena DN, WMADB Wickramasinghe, HMAB Herath and HME Jinadarie Lanka, 2007. Use of Single Super Phosphate as a source of Phosphorus in rice cultivation. Annals of Sri Lanka Department of Agriculture, Vol 9: 293-295.

•   Sirisena DN. and , W MN Wanninayake. 2014. Identification of promising rice varieties for low fertile soils in the low country intermediate zone in Sri Lanka. Annals of Sri Lanka Department of Agriculture 14: 95-105

• Sirisena DN. WMADB Wickramasinghe, WMW Weerakoon and RAND Ranatunge 2002, Determining   nitrogen response of rice through chlorophyll meter technique, Annuls of the Sri Lanka Department of Agriculture, 4: 424-428.

•  Sirisena DN., W MN WAnninayake and H M B A Herath .2013. Use of Phosphorous fertilizer in rice cultivation in Polnnaruwa district of the Low country dwet y zone. Annals of Sri Lanka Department of Agriculture 13: 113-125. 

• Sirisena, D N, Wanninayake W M N and Attapattu A M KB 2008. Determination of Electrical conductivity of two major rice growing soils using 1:5 soil water Suspensions and saturated extraction 10: 329 – 333.  

•  Sirisena, D N, WMUK Rathnayake, AMKB Atapattu and  WMADB Wickramasinghe,  2009, Productivity Enhancing Rice-Rice Cropping Syatems in Sri Lanka through Soil Fertility Management, Proceedings of 9^th ESAFS Conference, 27-30 September 2009, Seoul, Korea.

•  Sirisena, D. N. 2013. Best practices and procedures of saline soil reclamation   systems in Sri Lanka. In. Best practices and procedures of saline soil reclamation in SAARC countries. Eds. Tayan Raj Gurung and Abdul Kalam Azad. SAARC, Agriculture Center, 151- 171. 

• Sirisena, D.N., Rathnayake, W.M.U.K., Atapattu, A.M.K.B., and 2009. Enhancing productivity in rice – rice cropping systems in Sri Lanka through soil fertility management. 9^th ESAFS International symposium 2009. 27-30^th October 2009, Olympic Parktel Hotel, Korea  

• Sirisena, D.N., Rathnayake, W.M.U.K, Athapattu, RMK, 2012. Variability of soil pH, P, K, and Zn in rice breeding fields at Rice Research and Development Institute.  Proceedings of Fourth International Conference on Geo-information technology for natural disaster management, Colombo, Sri Lanka. Pp 168-170

• Sirisena, DN, N. P. Jayawardena, W. M. A. D. B. WickramasingheW.M U K. Rathnayake and R B Mapa2008. Spatial variability of some soil fertility parameters in rice fields of Girithale irrigation scheme Annals of Sri Lanka Department of  Agriculture, 10: 199-210                                 

• Sirisena, DN., WMADB Wickramasinghe and RAND Ranatunga. 2003, Performance of different forms of urea in rice cultivation. ASDA Annals of the Sri Lanka Department of Agriculture, Peradeniya. Vol. 5: 341 – 344.

• Sirisena. DN, WMADB Wickramasinghe, WMJ Bandara RAND Ranatunge and G Seneviratne. 2004, Estimation of methane and nitrous oxide emission from rice fields. Annuls of the Sri Lanka Department of Agriculture, Vol 6: 203-217.

• Srisena DN, WMADB Wickramasinghe, WMW Weerakoon, and D Kumaragamage and ST Bandara, 2003. Evaluation of leaf N based nitrogen fertilizer management in irrigated transplanted rice. ASDA, Annuls of the Sri Lanka Department of Agriculture, 5: 233-241.

• Sumith de Z. Abeysiriwardena. D, W.M.W. Weerakoon and W.M.A.D.B. Wickramasinghe 2009, System of Rice Intensification (SRI) As a Method of Stand Establishment in Rice, American-Eurasian Journal of Agricultural & Environmental Sciences, Vol. 5 No.2 2009 189-195.

• Velrajah,S. Wickramasinghe, W.M.A.D.B. Jinadasa, D.M, (2008) Spatial Variability of Soil Fertility Characteristics at the Kalinga Ela in Sewagama Agrarian Service Center in the Parakrama Samudra Irrigation Scheme in Polonnaruwa, Abstract Of Final Year Research Symposium 2008 (Vol : 02) Faculty of Agriculture, Rajarata University of Sri Lanka, http://repository.rjt.ac.lk/7013/143 

• Wanniarachchi, R, W.M.J Bandara  and G.A.Gunatilaka. 2002.  Effect of water regime on the performance of rice grown in iron toxic fields in low country wet zonel J. Soil Sci. Soc. Sri Lanka. 2002, 14:42-50

• Weerakoon WMW and WMADB Wickramasinghe, 1999. Present Status and Problems of N fertilizer in Rice in Sri Lanka. Proceedings of the 2^nd CREMNET Workshop / Group meeting, 24 – 27 August 1999. Soil and Water Management Research Institute, Thanjavar, Tamilnadu, India.

• Welagedara, W.M.P.K., B.L.W.K. Balasooriya, W.M.U.K. Rathnayake, W.S.Dandeniya, and I. Amarawansa. 2018.  Temporal Variations of Cyanobacteria in Long Term Unfertilized, Organic Fertilized and Inorganic Fertilized Paddy Fields. Proceedings of 17^th Agricultural Research Symposium, Wayamba University of Sri Lanka, Sri Lanka

• Wickramasinghe DB, DN Sirisena, WMUK Rathnayake, HMAB Herath, MenakaJinadari. 2007. Use of GIS to Assess the Spatial Variability of Soil Fertility Characteristics of the Rice Soils in the “ParakramaSamuddraya” irrigation Scheme in Sri Lanka.  8^th Conference of East and southeast Asian Federation of Soil Science, Tsukuba, Japan 10:199-210.

• Wickramasinghe WMADB and JDH Wijewardena, 2000. Soil Fertility Management and Integrated Plant Nutrition Systems in Rice Cultivation In Rice Symposium 2000, Ed by DS de Z Abeysiriwardena, DMN Dissanayake and N Nugaliyadde, Department of Agriculture, Peradeniya Sri Lanka. (125 – 140).

• Wickramasinghe WMADB, DN Sirisena, WMJ Bandara and JDH Wijewardena. 2003. Response of rice to application of phosphorus in Sri Lankan soils. Proceedings of the Workshop on Use of Phosphorus and potassium fertilizers in Sri Lankan Agriculture. 10-11 July 2003. Post Graduate Institute University of Peradeniya.

• Wickramasinghe WMADB. and WMW Weerakoon, 2000. Improvement and Sustenance of Soil Fertility – .A key Determinant of Rice Productivity in Sri Lanka, Proceedings of International Workshop on Rice Soil Fertility, April 24 –27, Makati City, Philippines.

• Wickramasinghe, D B, DN Sirisena, WMUK Ratnayake, HMAB Herath, Menaka Jinadari. 2007. Use of GIS to asses the Spatial Variability of Soil Fertility Characteristics of the rice soils in the “Parakrama Samudra” Scheme in Sri Lanka, Proceedings of the 8^th ESAFS Conference, 22-23 October 2007, Tsukuba, Ibaraki, Japan

• Wickramasinghe, W.M.A.D.B  2014, Soils of Sri Lanka and Biodiversity, Keynote Speech, Proceedings of National Soil Bio Diversity Symposium 2013, 10-11 December 2013, Ministry of Environment and Renewable Energy, Battaramulla, Sri Lanka. 

• Wickramasinghe, WMADB 1994. The solubility of rice straw silica and its use as a silicon source in paddy cultivation. PhD Thesis, University of Reading, UK.

• Wickramasinghe, WMADB 1995. Yield Stagnation? Management of rice soils for optimum production. Paper presented at Workshop on Rural Credit for Crop Production in Sri Lanka. 21-22 December, 1995, Colombo Sri Lanka.

• Wickramasinghe, WMADB and A R Dassanayake, 2003. Limitations and Management of Rice lands in the Intermediate Zone of Sri Lanka. 15-17, Proceedings of the 6^th East and South East Federation of Soil Science (EASFS) international conference on Soil Management Technology on Low-productivity and Degrades Soils. 24 –  29, November, 2003, National Taiwan University, Taipei, Taiwan. 

• Wickramasinghe, WMADB and JDH Wijewardena, 2000. Soil and Nutrient Management for increasing soil fertility towards increased rice productivity in Sri Lanka. ASDA Annals of the Sri Lanka Department of agriculture, Peradeniya. Vol. 2, 2000. 465 – 482.

• Wickramasinghe, WMADB, 1990. Use of organic manure in paddy cultivation, Paper presented at the workshop on Use of Organic Manure in Agriculture, Bandarawela, Sri Lanka.W

• Wickramasinghe, WMADB, 1999. Influence of plough layer depth on growth and yield of rice. ASDA Annals of the Sri Lanka Department of Agriculture, Peradeniya. Vol. 1, 1999. 231 – 236.

• Wickramasinghe,WMADB,  A.R. Dassanayake and D.N. Sirisena 2003, Potassium status of rice growing soils in Sri Lanka In Proceedings of the IPI-NFS International  Workshop on Importance of Potassium Fertilizer for Sustainable Production of Plantation and Food crops in Sri Lanka. Ed. VV Nossov and JDH Wijewardena (pp35- 42).

• Wickramasinghe. D B and  DL Rowell. 2006. The release of silicon from amorphous silica and rice straw in Sri Lankan soils. Biology and Fertility of Soils (42 ): 231–246.

• Wickramasinghe. WMADB 2004. Rice Straw Silica – Solubility characteristics and use as a silicon source in paddy cultivation. Jour. Soil. Sci. Soc. Sri Lanka. Vol 11, 1 – 17.

• Wickramasinghe. WMADB, 1987, Preliminary studies on Sink Source relationship of some rice varieties under different fertilizer regimes. In Rice Research Workshop 1987. Department of Agriculture/FAO, Sri Lanka.

• Wickramasinghe.WMADB, BVR Punayawardena 2009. Climate Change Adaptation and Natural  Resources Management in Sri Lanka, in Proceedings of the Regional Workshop on  Mainstreaming Climate Change Adaptation into Developmental Planning , 14-17 April 2009, ADBI, Tokyo, Japan.

• Wijesundara. SM, WMADB Wickramasinghe and C Wijesundara. 1995. Management of Chemical and Bio fertilizer In Rice Congress 1990. Ed by SL. Amarasiri, S Nagarajah and BMK Perara. Department of Agriculture, Peradeniya, Sri Lanka.

• Y M A M Wijeratne, N S Kottearachci, D R Gimjani and D N Sirisena.  Sri Lankan Fragrant rice (oryza sativa L.) varieties are associated with decrease salt tolerance 51- 56. Proceedings of the 11^th Agriculture Research symposium 20*21^st September 2011. Faculty of Agriculture and Plantation Management Wayamba University of Sri Lanka. Makandura, Gonawila ( NWP).

• Y M A M Wijeratne, N S Kottearachci, D R Gimjani and D N Sirisena.  Sri Lankan Fragrant rice (oryza sativa L.) varieties are associated with decrease salt tolerance 51- 56. Proceedings of the 11^th Agriculture Research symposium 20*21^st September 2011. Faculty of Agriculture and Plantation Management Wayamba University of Sri Lanka. Makandura,