• Analysis of project worth of the rubber sector
• Studies on rubber Based farming systems and their impact on Sustainable livelihood Development
• Strategies to livelihood development and poverty reduction through rubber farming
• Analysis of Rubber sector policy changes
• Analysis of the performance of rubber industry trade indices

• Analysis of exports performance of Rubber Sector in Sri Lanka
• Domestic and international rubber price analysis
• The economic viability of Rubber planting in traditional rubber growing districts in Sri Lanka
• Analysis of technical efficiency and productivity of smallholder latex harvesting in traditional rubber growing areas
• A comparative analysis of poverty incidence in rubber-based farming Systems

• Provide Feasibility analysis report on rubber cultivation in new planting.
• Provide information on domestic and international rubber market price, Rubber products marketing.
• Provide necessary guidance with various types of cost benefit analysis on rubber farming.
• Provide technical assistance in the preparation of compensation payments in rubber plantation damages

Journal papers

• Sankalpa, J.K., Ishani, P.G. and Wijesuriya, W. (2022) “Socioeconomic factors influencing farmers’ willingness to replant trees: Evidence from smallholder rubber farming in Sri Lanka,” Forests, Trees and Livelihoods, pp. 1–15. Available at: https://doi.org/10.1080/14728028.2022.2145509.
• JKS Sankalpa, W Wijesuriya, W Wimalaratana, PGN Ishani (2021) “Utilizing a farm typology for the development of rubber-based farming: A case from Moneragala District, Sri Lanka,” Journal of Rubber Research, 24(5), pp. 719–734. Available at: https://doi.org/10.1007/s42464-021-00127-2.
• Sankalpa, J.K.S., Wijesuriya, W. & Ishani, P.G.N. (2020). Do rubber-based agroforestry practices build resilience upon poverty incidence? A case study from Moneragala district in Sri Lanka. Agroforest Syst. https://doi.org/10.1007/s10457-020-00502-9
• Ishani, P.G.N., Wijesuriya, W. and Sankalpa, J.K.S. (2019) ‘Can Poverty be reduced through Improvement in Technical Efficiency in the Smallholder Rubber Sector: Case Study from Kegalle District of Sri Lanka’, Journal of the Rubber Research Institute
• Sankalpa J.K.S., Wijesuriya B.W., Karunaratne S.B. and Ishani P.G.N. (2017). Use of GIS Geographically Weighted Regression to determine productivity and their driving forces: A case study from the Kalutara district of Sri Lanka. Applied Economics and Business 1(2), 12-27. Available from http://aeb.wyb.ac.lk/index.php/v21p2/
• Sankalpa J. K. S., Wijesuriya B.W. and Jeewanthi P.W. (2013). Export performance of rubber products manufacturing sector in Sri Lanka. J. Rubber Research Institute of Sri Lanka, 93: 51-61. Available from http://dl.nsf.ac.lk/bitstream/handle/1/23136/JRRISL-93-51.pdf;sequence=1

Conference papers

• Ishani, P.G.N., Wijesuriya, W. and Sankalpa, J.K.S. (2019). Can Poverty be reduced through improvement in Technical Efficiency in the smallholder rubber sector: Case Study from Kegalle District of Sri Lanka. 7th Symposium on Plantation Crop Research, Colombo, Sri Lanka.
• Dissanayake, D.M.A.P., Ishani, P.G.N. Gunarathne, P.K.K.S., Ranawaka, R.A.D., Sankalpa, J.K.S.,Seneviratne, P., and Wijesuriya, W. (2019). Strategies to Prevent Evading from Rubber Planting: Introducing Gliricidia as a Fuel Wood in Smallholder Rubber Lands of Sri Lanka. International Rubber Conference-2019, Myanmar.
• Wijesuriya, W., Herath, H.M.L.K., Ishani, P.G.N., and Sankalpa, J.K.S. (2019). Forecasting of Rubber Prices in the Sri Lankan Market using Multiple Temporal Aggregation (M.T.A.). International Rubber Conference-2019, Myanmar.
• Sankalpa, J.K.S., Wijesuriya, W., Karunaratne, S. and Ishani, P.G.N. (2017). A comparison of spatial interpolation methods in developing yield maps of Natural Rubber (N.R.) for precision crop production: A case study from smallholder rubber lands in Kalutara District Sri Lanka. Proceedings of the International Statistics Conference, Sri Lanka.
• Sankalpa J K S, Wijesuriya B W, Karunaratne S, and Ishani P G N (2017). Use of GIS Geographically Weighted Regression to determine Natural Rubber productivity and their driving forces: A case study from the Kalutara district of Sri Lanka, International Rubber Conference, Indonesia 2017.
• Sankalpa J K S & Wijesuriya B.W. (2015).  Exports performance of raw natural rubber sector in Sri Lanka Bulletin of the rubber research institute of Sri Lanka (Accepted)
• Wijesuriya W I J, Sankalpa JKS, Liyanaarachchi LATS and Gayan MWH (2016). Drought indices to identify rainfall anomalies in rubber growing areas in Sri Lanka. International Rubber Conference, Cambodia, 2016.
• Gayan M W H, Wijesuriya WIJ, Sankalpa JKS, Punyawardena BVR, Premalal S, Herath HMLK, Karunaratne SB, Peiris BL and Amarasekara N (2016).   Comparing the use of Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspiration Index (SPEI) for identifying rainfall anomalies in the wet zone. Wayamba University International conference 2016.
• Liyanaarachchi L.A.T.S., Karunaratne S.B., Sankalpa J.K.S., Wijesuriya B.W., Gajanayake B. and Abeysinghe D.C. Development of land Suitability Map to expand Rubber in Northern Dry Zone of Sri Lanka: A case from Vavuniya District. Peradeniya University International Research Session, 2015.
• Jeewanthi P.W., Wijesuriya W. and Sankalpa J.K.S. “Changes Observed in Rainfall Patterns in Three Major Rubber Growing Areas”. Annual Research Colloquium on Agrarian Studies in Sri Lanka 2016: page 25.
• J K S Sankalpa, Senani Karunarathne and Wasana Wijesuriya (2014).  Land suitability evaluation using multi criteria decision approach and GIS: Special focus on Ampara district of Sri Lanka. YSF Symposium 2014.
• P W Jeewanthi, J K Sajeep Sankalpa and Wasana Wijesuriya (2014). Use of information on rainfall behaviour to assist timely management of agronomic operations in rubber plantations in the agro ecological region-WL1A. YSF Symposium 2014.
• Wijesuriya WIJ, Sankalpa JKS, Liyanaarachchi LATS and Gayan MWH (2016). Drought indices to identify rainfall anomalies in rubber growing areas in Sri Lanka. International Rubber Conference, Cambodia, 2016.
• Gayan MWH, Wijesuriya WIJ, Sankalpa JKS, Punyawardena BVR, Premalal S, Herath HMLK, Karunaratne SB, Peiris BL and Amarasekara N (2016).   Comparing the use of Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspiration Index (SPEI) for identifying rainfall anomalies in the wet zone. Wayamba University International conference 2016.
• Liyanaarachchi L.A.T.S., Karunaratne S.B., Sankalpa J.K.S., Wijesuriya B.W., Gajanayake B. and Abeysinghe D.C. Development of land Suitability Map to expand Rubber in Northern Dry Zone of Sri Lanka: A case from Vavuniya District. Peradeniya University International Research Session, 2015.
• Jeewanthi P.W., Wijesuriya W. and Sankalpa J.K.S. “Changes Observed in Rainfall Patterns in Three Major Rubber Growing Areas”. Annual Research Colloquium on Agrarian Studies in Sri Lanka 2016: page 25.
• J K S Sankalpa, Senani Karunarathne and Wasana Wijesuriya (2014).  Land suitability evaluation using multi criteria decision approach and GIS: Special focus on Ampara district of Sri Lanka. YSF Symposium 2014.
• P W Jeewanthi, J K Sajeep Sankalpa and Wasana Wijesuriya (2014). Use of information on rainfall behaviour to assist timely management of agronomic operations in rubber plantations in the agro ecological region-WL1A. YSF Symposium 2014.
• Wijesuriya, Wasana, J.K.S. Sankalpa, S.B. Karunaratne, D.M.A.P. Dissanayake, P.W. Jeewanthi and O.V. Abeywardene. (2014). Identifying Rainfall and Drought Dynamics Using Standardized Precipitation Index (SPI): An Application in Non-traditional Rubber Growing Areas in Eastern, North Central and Northern Provinces of Sri Lanka.  5th symposium on PCR
• Hettiarachchi, L.G., Wijesuriya, W., Nugawela, A., Sankalpa, J.K.S. and Karunaratne, S.B. (2013). Spatial Distribution of Productivity and Technical Efficiency of Smallholder Rubber Lands in the Kaluthara District.Proceedings of 12th Agricultural Research Symposium:1-5

Bulletin articles

• Ishani, P.G.N., Rodrigo, V.H.L., Sankalpa J.K.S and Rathnayaka, A.M.R.W.S.D. (2020) ‘Are you opt to intercrop your rubber lands; if so, which system is more profitable?’, Bulletin of the Rubber Research Institute
• Sankalpa, J. K. S. & Wijesuriya B.W. (2015). Exports performance of raw natural rubber sector in Sri Lanka. Bulletin of the Rubber Research Institute of Sri Lanka 95

Newspaper articles

• සංකල්ප ජේ. කේ. එස්. (2017). ලෝක ස්වභාවික රබර් ක්ක්ෂේත්‍රයේ මෑතකාලීන ප්‍රවණතා. ).සිළුමිණ පුවත්පත. විස්තර සඳහා. http://www.silumina.lk/2017/09/23/සල්පි /රබර්-වගාජේ-මෑත-කාලීන-ප්%E2%80%8Dරවණතා
• සංකල්ප ජේ. කේ. එස්. (2017).. රබර් මිල කෙරෙහි අනෙකුත් සාධකවල බලපෑම. සිළුමිණ පුවත්පත. විස්තර සඳහා http://www.silumina.lk/2017/09/30/සල්පි /රබර්-මි -ජකජරහි-අජනකුත්-සාධකව -බ පෑම