- Illangakoon TK, Marambe B, Keerthisena RSK, Bentota AP, Piyasiri CH, Somarathne JMNP, Geethika WUS and Kumar V. 2019. Agronomic management practices to enhance crop establishment, grain yield and weed suppression in flooded-Direct seeded rice. Tropical Agriculturist. 167 :.
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- Illangakoon TK, TMarambe B, Keerthisena RSK, Bentota AP, Kulatunge S, Kumar V and Ismail A.2018. Performance of Anaerobic Germination-Tolerant Rice Varieties in Direct Seeding: Effects on Stand Establishment, Weed Growth and Yield under Different Seeding Rates. Tropical Agriculture Research 29(3): 276-287
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- Illangakoon TK, Somaratne JMNP, Keerthisena RSK, Sudheera NL, Geethika WUS, Piyasiri CH, Rajarathne YPAKY, Abeysundara MD and Kumar V. 2018 Ccomparative performance of growth, yield and profitability of mechanically transplanted rice. Tropical Agriculturist 166 (2):1-18.
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- Illangakoon TK, Keerthisena RSK, Bentota AP, Piyasiri CH and Somarathne JMNP 2017. Variability in maturity duration and yield of some popular rice varieties over climatic zone, season and location. Annals of Sri Lanka Department of Agriculture. 19 (1):1-15.
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- Lllangakoon TK, Somaratne JMNP, Keerthisena RSK, Abeysundara MD, Piyasiri CH, and Kumar V 2017. Impact of varieties, spacing and seedling management options for growth and yield of mechanically transplanted rice. Annals of Sri Lanka Department of Agriculture. 19 (1):112-128
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- Illangakoon TK, Somarathne JMNP,. Paththinige SS, Piyasiri CH, Keerthisena RSK, Bentota AP, Udawela UAKS, Weerakoon WMW, and Marambe B 2017. Screening of rice lines for drought resistance under imposed drought stress during the reproductive and grain filling stages. Proceedings of the 1st International Symposium on Agriculture, Eastern University, Sri Lanka. 6th October 2017. Pp 11-24.
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- Illangakoon TK, Somaratne JMNP, Paththinige SS, Keerthisena RSK, Piyasiri CH, Abeysundara MD and Thushara IH 2016. Diversity and correlation among agronomic traits in newly improved rice varieties under drilling and random broadcasting. Tropical Agriculturist. 164:29-45
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- Illangakoon TK, Ella ES, Ismail AM, Marambe B, Keerthisena RSK, Bentota AP, and Kulatunge S 2016. Impact of variety and seed priming on anaerobic germination-tolerance of rice varieties in Sri Lanka. Tropical Agriculture Research. 28(1):26-37
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- Gunarathna SP, Wickramasingha KV, Kannagara BK, Chandrasekara KKD, Munasinghe AE, Nagasena NMLD, Duminda DMS, Piyasiri CH,.Hitinayake HMC, Silva LC, Withanawasam DM and Iqubal YB. 2016. Protien and Micronutrient content of selected rice varieties grown in different agro –ecological regions in Sri Lanka. Annals of Sri Lanka Department of Agriculture 2016, 18:294.
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- Piyasiri CH, Weerakoon WMW., Dissanayake DMN, Keerthisena RSK, Illangakoon TK, Geethika WMUS, Walisinghe R, Seneviatne SA, Somarathne JMNP and Abeysundara MD 2015. Bg 251 as a drought tolerant, short age rice variety for moisture stressed rainfed areas. Annals of Sri Lanka Department of Agriculture. 17:43-46.
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- Wasala SK, Ubeysekara NM, Gunasekara PS, Wickramasooriya NK, Senavirathne SI, Karunaratne SP, Senavirathne CM, Silva LC, Senanayake DMJB, Illangakoon TK, Somaratne NP and Abeynayake NR 2015. Screening of rice germplasm for response to drought at reproductive stage under induced drought stress conditions. Annals of Sri Lanka Department of Agriculture. 17:47-50.
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- llangakoon TK and Somaratne, JMNP. 2014. Variation in morpho-physio traits of selected rice (Oryza sativa L.) germplasm in response to water stress during the vegetative stage. Annals of the Sri Lanka Department of Agriculture. 16:45-57
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- Piyasiri CH, Weerakoon WMW, Dissanayake DMN, Silva LC, Priyadarshini TNN, Geethika WMUS, Rathnayake MYAS and Hettiarachchi. HANS 2012. Rice varieties for moisture stressed ecosystems. Annals of Sri Lanka Department of Agriculture 14:97-113.
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- Silva LC,WeerakoonWMW, Piyasiri CH, DasanayakeDMND, Basnsyake BMMP and Geethika WMUS 2012. Effect of low night temperature on pollen and spikelet sterility in field grown rice (Oryza sativa L.).Annals of Sri Lanka Department of Agriculture 2012.14:135-143.
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- SilvaLC, KarunasenaDDNP, WeerakoonWMW, Piyasiri CH and Subasinghe A 2010. Effect of seed incubation on seedling establishment and emergence of different rice varieties under submerge condition. Rice congress 2010. Sri Lanka. Abstract of posters p:37-38.
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- Silva LC, Weerakoon WMW, Basnsyake BMMP, Subasinghe A 2010. Effect of late planting and air temperature on physiological maturity of different rice varieties. Rice congress 2010. Sri Lanka. Abstract of posters p:39-40.
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- WMW, Priyadarshani TNN, Piyasiri CH and Silva LC 2010. Impact of water saving irrigation systems on water use, growth and yield of irrigated lowland rice. Annals of the Department of Agriculture, Sri Lanka 2010. 12:213-222
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- Weerakoon WMW, Priyadarshini TNN, Piyasiri CH and LS Silva 2009., Impact of water saving irrigation systems on water use, growth and yield of irrigated lowland rice. Paper submitted to the “Water. Food security and climate change in Sri Lanka. 9 – 11 June 2009,
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- Weerakoon WMW 2009. Future challenges for rice cultivation in Sri Lanka. Paper submitted to the “Water. Food security and climate change in Sri Lanka. 9 – 11 June 2009
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- Weerakoon WMW, Abeywickrama T, de Costaand WAJM and Maruyama A 2009. Out-crossing of heat stress affected spikelets of lowland rice in the sub-humid one of Sri Lanka and its long-term implications. Proceedings of the International workshop on “Challenges for Agro-Environmental research in Monsoon Asia” October 5-9, Tsukuba, Japan.
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- Silva LC, Subasinghe A, Weerakoon WMW, Piyasiri CH and Basnsyake BMMP2009. Effect of Air temperature on spikelet opening duration of the panicle and grain filling characteristics of rice (Oryza sativa L.). Proceeding s of second national symposium 2009,Faculty of Agriculture, University of Ruhuna.
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- Weerakoon WMW, Priyadarshani TNN, Piyasiri CH and Silva LS 2009. Impact of Water Saving Irrigation Systems on Water Use, Growth and Yield of Irrigated Lowland Rice, Proceedings of the National Conference on Water, Food Security and Climate Change in Sri Lanka, BMICH, Colombo June 9-11, 2009.
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- Weerakoon WMW., Maruyama A, and Ohba, K 2008. Impact of humidity on temperature induced grain sterility in rice (Oryza sativa L.) Journal of Agronomy and Crop Science., 194: 135-140.
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- Weerakoon WMW 2008. Future of rice with limited water in Sri Lanka, Proceedings of the Soil Science Society symposium, May 2008.
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- Weerakoon WMW 2008. Impact of climate change on rice cultivation in Sri Lanka. National workshop on climate change on Agriculture, ISTI, Gannoruwe, May 22, 2008.
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- Subasinghe A, Nissanka, NAASP and Weerakoon WMW 2007..Identification of salt tolerant rice varieties at the seed germination stage and its relationship to seed husk thickness and iron absorption. Tropical Agricultural Research, 19, 219-228.
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- De Costa WAJM, Weerakoon WMW, Herath HMLK, Amaratunga KSP and Abeywardena RMI 2006. Physiology of yield determination of rice under elevated carbon dioxide at high temperatures in a subhumid tropical climate, .Field Crops Research 96:336-347.
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- Weerakoon WMW, Wickramasinghe WMADB, Bandara KMC, Mutunayake MP and Laddha JK 2006.. Constraints to maximize production and resource utilization efficiencies of direct seeded lowland rice (Oryza sativa L.) in Sri Lanka. Proceedings 2nd International Rice Congress, 9 -13 October, New Delhi, India.
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- Weerakoon WMW, Ingram KT and Moss D 2005 Atmospheric CO2 concentration effects on N partitioning and fertilizer N recovery in field grown rice (Oryza sativa L.) Agriculture Ecosystem & Environment.,108: 342-349
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- Weerakoon WMW, Costa WAJM de, and Abeysiriwardena DS de Z. 2005. Physiological responses of Indica rice varieties to increased atmospheric CO2 and temperature, Journal of Agricultural Meteorology 60(5): 601-604
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- Bandara WMJ, Wickramasinghe DB and Silva LC 2004. Effect of applied Zn on N use efficiency , growth and yield of rice grown in Low Humic Glay soils of low country intermediate zone. . Annals of Sri Lanka Department of Agriculture 2004. 6:39-47.
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- Bandara WMJ, Wickramasinghe DB, Sirisena DN and Silva LC2003. Effect of applied P on Zn availability , growth and yield of rice grown in Low Humic Glay soils of low country intermediate zone. Annals of Sri Lanka Department of Agriculture 2003. 5:323-332.
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- Costa de WAJM, Weerakoon WMW, Abeywardena RMI and Herath HMLK 2003. Response of photosynthesis and water relations of rice (Oryza sativa L) to elevated atmospheric CO2 in sub humid zones of Sri Lanka. Journal Agronomy and Crop Science, 189 ; 71-82
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- Costa de WAJM, Weerakoon WMW, Herath HMLK and Abeywardena RMI 2003. Response of growth and yield of rice (Oryza sativa L) to elevated atmospheric CO2 in sub humid zones of Sri Lanka. Journal Agronomy and Crop Science, 189 ; 83-95
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- Weerakoon WMW, Maruyama A, Ohba, K.] 2002. Impact of high Temperature during flowering on grain formation in Indica and Japonica rice, .Proceeding of the meeting on Environmental Engineering in Agriculture, Graduate school, University of Tokyo, Tokyo, Japan. August 6th to 8th 2002
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- Weerakoon WMW, Maruyama A, Ohba, K. 2002. Effect of Atmospheric Relative Humidity and Wind on high Temperature induced spikelet fertility of Japonica and Indica rice. Proceedings of the association of Kyushu Agricultural Research Scientists, September 19, 2002, Isahaya, Nagasaki.
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- Weerakoon WMW 2002. Maximize rice yield through minimizing removal, 2002. Rice Techno-guide, Rice Research & Development Institute, Sri Lanka
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- Weerakoon WMW 2002 .Water stress Effects, Water management systems Irrigation requirement of rice in Sri Lanka. Rice techno-guide, Rice Research & Development Institute, Sri Lanka.
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- Bandara WMJ and Silva LC 2001..Rice crop response to Zn application in Low Humic Glay soils of Low Country Intermediate zone Annals of Sri Lanka Department of Agriculture 2001. 3:9-18.
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- Bandara WMJ and Silva LC 2000..An assessment of micronutrient requirement for rice grown in Low Humic Glay soils in low country dry zone.Annals of Sri Lanka Department of Agriculture 2000. 2:35-46.
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- Weerakoon WMW, Ingram KT and Moss DN 2000. Atmospheric carbon dioxide and fertilizer nitrogen effects on radiation interception by rice. Plant and Soil. 220: 99-106.
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- Weerakoon WMW, Abeysekara A and Wijesundera C 2000. Agronomic strategies to increase rice yields in Sri Lanka. Annual Symposium of the Department of Agriculture, Sri Lanka. 2: 435-451
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- Weerakoon WMW. Olsyzk D Moss D 1999. Effect of Nitrogen nutrition on response of rice seedlings to Carbon Dioxide. Agriculture Ecosystem & Environment, 72(1):1-8,
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- Weerakoon WMW 1999. Effect of stocking density and feeding on growth and survival of carp fry in low land rice paddies. Annual Symposium of the Department of Agriculture, Sri Lanka. 1; 71-78.
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- Weerakoon WMW 1999. Present status and problems of nitrogen fertilizer management in rice in Sri Lanka. In proceedings of the International workshop on innovative nitrogen and other crop management techniques for intensive rice systems of South Asia, Thanjavur, India, 24-27 August 1999.
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- Olszyk D, Wise C and Weerakoon WMW 1993. Effect of CO2 and Temperature on five rice cultivars. Journal of Agricultural Meteorology 48(5):787-790.
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