- Mobile: +94-77-1230208
- Office: +94-41-2292386 (263)
- Fax: +94-41-2292382
- Email (personal): plagalwis@gmail.com
- Email (office): aalwis@ageng.ruh.ac.lk
Find on:
Senior Professor P.L.A.G. Alwis
Specialized Areas
• The evaluation of land preparation methods adapted by the paddy farmers.
• Development and evaluation of draught animal power equipment and accompanying technology for improved wet zone paddy farming.
• Reversible 2 bottom ploughs for small and medium power tractor.
• Production of biomass bricks.
• Development of fruit harvesting technology.
• Studies on the draft ability of the ruminant to increases the work efficiency through the use of improved harness and tools.
• Development of fabrication technology of compost pellets.
• Highland seeder for gingerly.
• Development of swinging Lugs reversible Cage wheels for small and medium power Tractors.
Patents…………………………………………………………………………………………………………………………………………………………
No. Apply Date Patent no Title
1 2004.02.16 13130 retractable cage wheel for tractors
2 2004.02.16 13129 Folding type cage wheel for 4 wheel tractor
3 2004.07.30 13361 Multipurpose cage wheel
4 2004.06.30 13360 PLAG upland penitrometer.
5 2004.06.30 13352 Non-stop Cultivator with leaf spring safety device.
6 2004.06.30 13353 Multi Row Hill Dropping Fertilizer-Seeder.
7 2004.11.15 13451 Wetland sludge core sampler
8 2006.06.29 13817 PLAG Lowland Penitrometer.
9 2005 09.08 7710 A buddy trailer/Box type carrier : I. D
10 2005 09.08 7713 A manually operated low cost seeder for small seeds : I. D
11 2005 .09.08 7711 Water lifting device/Coil pumpPatent : I. D
12 2005.09.08) 7712 bended tube fruit harvesting devicePatent : I. D
13 2005 .09.15 7731 fruit harvesters /serrated knife fruit harvestersPatent : I. D
14 2005 09.15 7732 Shearing jaw type fruit harvesters : I. D
15 2005 09.08 7708 A Reversible mouldboard plough.(Patent for I D:
16 2005 .09.08 7709 A Double bottom mouldboard plough for power tiller.Patent : I. D
17 2009.06.09 7895 Slurry maker Patent : I. D
18 2006.03.17 7894 Air flow type paddy broadcaster,Patent;ID
19 NA 8080 Power tiller operated fertilizer applicator for coconut cultivation(Patent for Patent : I. D
20 2006.09.15 8081 Two wheel tractor operated sugar cane harvester.Patent : I. D
21 2008 .12.29 15251 Reversible Latex Knife with Anticoagulant Scraper
22 2008.12.29 9004 Multipurpose pelleting machine with mixture and sieve shaker. I. D
23 2008.12.29 9005 Battery operated ceramic headed electric rubber tapping machine. Patent: I. D
24 2010.05.29 9008 Implement mounting Structure for small and medium tractors. Patent: I. D
25 2008.12.29 9006 Safety sky cracker launcher for monkey chasing. Patent for Industrial Design I. D
26 2008.12.29 9007 Two way bush cleaning knife for cinnamon.: I.D
27 2013.10.21 10756 Insect free Meditation chair,: I. D
28 2013.10.21 10760 Pending Inter raw weedicide dropping pushcart. Patent: I. D
29 2013.10.21 10759 Papaw harvester(Patent for Patent: I. D
30 .2013.10.21 10758 Multi Fruit picker.: I. D
31 2013.10.21 10761 U – brass cinnamon rubbing device., : I. D
32 2013.10.21 10757 A Relaxed clay pot holder.Patent : I. D
33 2014.11.24 11079 A Hygenic Cinnamon harvesting knife.; I. D
34 NA 11226 Hair safety cap for female labors
35 2015.07.16 11324 Compaction test Mould for Agriculture ,Patent : I. D
36 2015.07.24 11331 A Multi-purpose knife sharpener for Cinnamon harvesting knife (caththa).: I. D
37 2015.05.13 11227 A food penetrometer : I. D
38 2017.09.18 19520 Blow pollinator for sugar cane
39 2017.09.18 19519 Pneumatic type Precision seeder for Cinnamon (Cinnamomum zeylanicum) nursery
40 2017.09.18 19518 Semi-automated mushroom grow bag filling machine
41 02.11.2017 19584 Rotary Screw type cireling machine head for automatic scrapping and rubbing of cinnamon sticks. (Cinnamomum zeylanicum)
42 NA Pending Remote controlling vacuum type precision seed metering device for automatic seed tray filling and direct seeding in paddy.
43 NA 20076 pneumatic metering type precision paddy (Oryza sataiva) seeder Machine.
44 09.07.2018 20077 Twisted blades height Adjustable paddy weeding Machine.
45 2018.09.07 20078 Vibration Assisted Automatic machine for scrapping and rubbing steps of cinnamon processing.
46 2019.09.06 NA Engine Powered Paddy Weeder
47 2019.09.06 20683 Pneumatic Pressure controllable reciprocating Jaw mechanism for rubbing of Cinnamon sticks (cinnamomum zelanicum)
48 2019.09.20 20745 Banana Leaf Withering Machine
49 2019.09.20 20756 Budding Puncher
50 2019.09.20 20746 Hand held Vacuum type precision paddy seeder
51 2019.09.20 20747 Multipurpose foldable Mammoty
52 2019.09.20 20754 Mechanical powered Rotary type precision paddy seeding machine.
53 08.09.2020 13361 Keta panela Door
54 27.08.2020 13329 Fit panela Door
1. Muthumala, C.K., De Silva, S., Arunakumara, K.K.I.U. et al. Failure Modes and Compression Strength of Seven Finger-Jointed Wood Species from Sri Lanka. J Fail. Anal. and Preven. (2021). https://doi.org/10.1007/s11668-021-01274-9
2. K.D.N. Weerasinghe and P.L.A.G. Alwis (1982) Comparative study at Mapalana Soils in relation to their Physical properties, Presented at the 38th annual session of Sri Lanka Association for the Advancement of Science, December ,1982.
3. K.D.N. Weerasinghe and P.L.A.G. Alwis (1985) Physical properties of Red Yellow Podzolic soils under Rubber Cinnamon and Coconut cultivation in Mapalana Research Farm (1985) ,Rohana 1, 55-58 , University of Ruhuna.
4. P.L.A.G. Alwis (1991) Méthode de caractérisation in situ des sols soumis a des contraintes engendrées par I ‘action d’outils, Machinisme Agricole Tropical, 1991 Juillet-Septembre, p25 CEEMAT- CIRAD, France.
5. G. Maniere and P. Alwis , (1997) Les constituants minéraux du sol , Nature et propriétés en relation avec le travail du sol, Bulletin Technique D’information, Ministère de Agriculture et du développement Rural, Publication Mensuelle, 278-97 Paris, 7e 555-94.50, p155-169.
6. G. Maniere and P. Alwis , (1997) Propriétés Mécaniques du Système sol-air -eau, Bulletin Technique D’information, Ministère de Agriculture et du développement Rural, Publication Mensuelle, 278-97 Paris, 7e 555-94.50, p155-169.
7. P.L.A.G. Alwis (1998), Research préliminaires a la modélisation du système tracteur-outil-sol. Car de la houe rotative, Bulletin Technique D’information, Ministère de Agriculture et du développement Rural, Publication Mensuelle, 278-97 Paris, Juillet-Septembre ,7e 555-94.50.
8. P.L.A.G. Alwis (1999), Development and testing of folding type Cage wheel for four wheel tractor, Presented at the 55th annual sessions of Sri Lanka Association for the Advancement of Science, Nov 1999.
9. P.L.A.G. Alwis (2000), Development and Testing of a Cage wheel with retractable lugs for four wheel tractor, Presented at the 56th annual sessions of Sri Lanka Association for the Advancement of Science, Nov/Dec. 2000
10. P.L.A.G. Alwis (2000), Retractable Cage wheels for small and medium power tractor, VIDYA ,vol2,no2,April 2000, National Science Foundation.
11. P.L.A.G. Alwis (2001), A new mud wheel with retractable lugs for power tiller. Presented at the 57th annual sessions of Sri Lanka Association for the Advancement of Science, Nov/Dec. 2001.
12. P.L.A.G. Alwis (2002), A multipurpose cage wheel with floating lugs for four wheel tractors. Presented at the 58th annual sessions of Sri Lanka Association for the Advancement of Science, Nov/Dec. 2002.
13. P.L.A.G. Alwis (2002, Retractable Cage wheels for small and medium power tractor, Research Highlights, NSF ,vo1,p 14-16 2002 National Science Foundation.
14. P.L.A.G. Alwis (2003), Development and Evaluation of a New Cage Wheel for Power Tiller, Presented at the First Academic Sessions, held in University of Ruhuna’ Matara, Sri Lanka, July 4th 2003.
15. P.L.A.G. Alwis, N.P.G. Pushpitha and I.K Ruwansiri, (2003) Design and development of a manually operated low cost seeder for small seeds. Presented at the 59th annual sessions of Sri Lanka Association for the Advancement of Science, Nov/Dec. 2003.
16. P.L.A.G. Alwis, N.P.G. Pushpitha, J.C. Rathnayaka, (2003), Design and development of a low cost double bottom mouldboard plough for power tiller, Presented at the 59th annual sessions of Sri Lanka Association for the Advancement of Science, Nov/Dec. 2003.
17. P.L.A.G. Alwis (2003), Development and Evaluation of a manual seeder for small seeds, Presented at the Symposium on ‘Technologies for Environmental protection and sustainable Agriculture’ held in Colombo, Sri Lanka, 19th – 21st November, 2003.
18. P.L.A.G. Alwis (2003), Design and Development of a Low cost reversible Mouldboard plough for Power Tiller, Presented at the Symposium on ‘Technologies for Environmental protection and sustainable Agriculture’ held in Colombo, Sri Lanka, 19th – 21st November , 2003.
19. P.L.A.G. Alwis, (2003), A semi-automatic micro reliefmeter for seedbed characterization, paper presented at the International Symposium on Ninth annual Forestry and environment held in Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Nugagoda, 27th – 28th February 2004.
20. P.L.A.G. Alwis, K.D.H. Aberathna, L.W.S. Pemasiri, P. Palliyaguru, (2003), Design and development of a low cost mounted type single leg subsoiler, paper presented at the International Symposium on Ninth annual Forestry and environment held in Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Nugagoda, 27th – 28th February 2004.
21. P L A G Alwis,P D S Munasinghe, (2004), Design and development of a bended tube fruit harvesting device. Presented at the 60th annual sessions of Sri Lanka Association for the Advancement of Science, December.2004.
22. P L A G Alwis*, K H D Abeyrathna(2004) Development and testing of a non- stop cultivator with leaf spring safety device for four wheel tractor. (Patent no:13352). Presented at the 60th annual sessions of Sri Lanka Association for the Advancement of Science, December.2004.
23. P L A G Alwis*, N P G Pushpitha, H A C A Kumarasinghe (2004) Development of manually operated low cost paddy weeder.. Presented at the 60th annual sessions of Sri Lanka Association for the Advancement of Science, December.2004.
24. P L A G Alwis*, K G P S Sagara, (2004)Design and development of a direct paddy seeder for row seeding of paddy with plant spacing in drained paddy fields. (Patent no:13353). Presented at the 60th annual sessions of Sri Lanka Association for the Advancement of Science, December.2004.
25. P.L.A.G. Alwis (2004), Design and Development of a row seeder for Gingelly Kurakkan and Meneri, Presented at the Second Academic Sessions, held in University of Ruhuna, Matara, Sri Lanka, 16th December 2004.
26. P L A G Alwis*, (2005) Use of new cone Upland penitrometer for soil strength measurements of Red yellow Podzolic soil under forest cover. Paper Presented to the International Symposium on Tenth annual Forestry and environment held in Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Nugagoda, Dec 2005.
27. P L A G Alwis*, L.W.S. Pemasiri, N.P.G. Pushpitha, (2005) Design and development of a low cost petite trailer for farm transport. paper presented at the International Symposium on Tenth annual Forestry and environment held in Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Nugagoda, Dec 2005.
28. P L A G Alwis* (2005) Development and testing of wetland sludge core sampler. (Patent No:13451)Presented at the 61th annual sessions of Sri Lanka Association for the Advancement of Science, December.2005.
29. P L A G Alwis*, L.W.S. Pemasiri , N.P.G. Pushpitha, (2005) Design and development of a low cost screw type Coil pump for irrigation purposes. Presented at the 61th annual sessions of Sri Lanka Association for the Advancement of Science, December.2005.
30. P.L.A.G. Alwis, L.W.S. Pemasiri, W.S.K Rathnayake (2006), Design and development of a power tiller operated multipurpose whole stick harvester especially for sugarcane. paper presented at the International Symposium on Eleventh annual Forestry and environment held in Villa Ocean View, Wadduwa, by University of Sri Jayewardenepura, Nugagoda 22nd – 23rd December 2006.
31. P.L.A.G. Alwis, L.W.S. Pemasiri, K. P. W. Lakmal (2006), Multi-Use two Wheel tractor operated fertilizer applicator for coconut cultivation. Paper presented at the International Symposium on Eleventh annual Forestry and environment, organized by Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Nugagoda, held in Villa Ocean View, Wadduwa, 22nd – 23rd December 2006.
32. P L A G Alwis*, L.W.S. Pemasiri, J.L.A.H. Roshantha, (2006) Design and development of a power tiller Operated centrifugal manure spreader with slurry maker for organic farming. Presented at the Third Academic Sessions, held in University of Ruhuna, Matara, Sri Lanka, January 2006.
33. P L A G Alwis*, L.W.S. Pemasiri, J.L.A.H. Roshantha, (2006)Design and development of air flow Type new paddy broadcaster. Presented at the Seventh Annual Research session of Agricultural Graduates 2006, held in Faculty of Agriculture, University of Ruhuna, Matara, Sri Lanka, 3rd November 2006.
34. P L A G Alwis*, L.W.S. Pemasiri (2006) Design and development of a power tiller operated fertilizer applicator for coconut cultivation. Presented at the 62nd annual sessions of Sri Lanka Association for the Advancement of Science, December.2006.
35. P L A G Alwis*, L.W.S. Pemasiri (2006) Design and development of a power tiller operated sugarcane harvester. Presented at the 62nd annual sessions of Sri Lanka Association for the Advancement of Science, December.2006.
36. P. L A G Alwis*,W.V.S. Lasantha (2007),Design and development of a Rubber tapping machine. Presented at the 9th Annual Research session of Agricultural Graduates 2006,held in Faculty of Agriculture, University of Ruhuna, Matara, Sri Lanka, 3rdSeptember 2007.
37. P L A G Alwis*, (2007) A device for climbing a vertical member such as a Coconut tree or pole. Presentedat the 63rd annual sessions of Sri Lanka Association for the Advancement of Science, December. 2007.
38. P L A G Alwis*, W.V.S.lasantha(2008) Design and development of a battery operated rubber tapping machine. Presented at the 64th annual sessions of Sri Lanka Association for the Advancement of Science, December. 2008.
39. P L A G Alwis*, J.L.A.H. Roshantha (2008) A low cost two wheel Tractor operated Tine Tiller for paddy cultivation. Presented at the 64th annual sessions of Sri Lanka Association for the Advancement of Science, December. 2008.
40. P L A G Alwis*, J.L.A.H. Roshantha (2008) Design and development of a multistage root crop harvester for Power Tiller. Presented at the 64th annual sessions of Sri Lanka Association for the Advancement of Science, December. 2008.
41. .P L A G Alwis (2009) Design and development of a reversible and removable blade type Rubber tapping knife. Percent at the section C of the 65th annual sessions of Sri Lanka Association for the Advancement of Science, December. 2009. (SLAAS Supply in CD)
42. P.L.A.G. Alwis, M.A Wijeratna and G.D Amarasinghe (2014), Modification of microlite Tea harvester to improve the leaf quality, paper presented at the Wayamba University International Conference ‘WinC2014’Sri Lanka , 29 – 30 August 2014.
43. Alwis P. L. A. G, Hashini Abeysuriya A. P. I, Navaratne. S.B (2015), Design and Development of a Low Cost Prototype Food Penetrometer to Evaluate Quality of Foods, International Journal of Scientific & Engineering Research, Volume 6, Issue 6, June-2015 ISSN 2229-5518, http://www.ijser.org.3.8IMPACTFac
44. P.L.A.G.Alwis, P.D.Kahandage,C.P Rupasinghe, G.V.T.V Weerasooriya (2016), Mechanization of Growing Media preparation and polybags filling in Oyster Mushroom (pleurotusostreatus) cultivation, Presented at the International Symposium on Agriculture and Environment, ISAE-2016, held in Faculty of Agriculture, 13thJanuary 2016.
45. Muthumala, Chaminda and De Silva, Sudhira and Arunakumara, K.K.I.U. and Alwis, P.L.A.G, (2017) Identification of Joint efficiencies in 13mm Finger jointed Timber species used in Sri Lanka, Springer Nature, an academic publishing company, ( 2015) merger of Springer Science+Business Media and Holtzbrinck Publishing Group’s Nature Publishing Group.pp 261-267,2020.
46. P.L.A.G.Alwis, .D.Kahandage, C.PRupasinghe,G.V.T.V Weerasooriya (2016) Mechanization of Oyster Mushroom (pleurotusostreatus) production with Mango Saw Dust, Presented at the 3rd International Research Symposium – 2015, Rajarata University of Sri Lanka, 26th – 27th January 2016.
47. P.L.A.G. Alwis, A.A. Madubasha, K.M.T.S. Bandara, B.M.S. Jinendra (2016),Design and Development of Low Cost Nursery Seeder for Cinnamon- Cinnamomum zelanicum, International Journal of Scientific and Engineering Research (IJSER) – Volume 7, Issue 2, February 2016 Edition (ISSN 2229-5518). IJSER. http://www.ijser.org,3.8IMPACTFac.
48. Muthumala, Chaminda and De Silva, Sudhira and Arunakumara, K.K.I.U. and Alwis, P.L.A.G, (2017) Properties of finger jointed hardwood and softwood timber species in Sri Lanka; .8th structural Engineering and construction management. Kandy, Sri Lanka. 2017.(ICSECM) pp.106-111
49. Muthumala, C.K., De Silva, Sudhira, Arunakumara, K.K.I.U and Alwis, P.L.A.G., Arachchi C.I.M., and Pathirana, G.P.D.S. 2017. Analysis of customer satisfaction and prices of finger jointed wood products, International Forestry & Environmental Symposium, USJP, Sri Lanka.
50. KMTS Bandara, BM Jinendra, PLAG Alwis, NK Hettiarachchi and KGG Wijesinghe,( 2018) ‘Comparison of Operating Force Required for Traditional Cinnamon (Cinnamomum zeylanicum) Peeling Processes with Respect to Diameter and Peelability of Sticks’ at the International Symposium on Agriculture and Environment 2018 University of Ruhuna, Sri Lanka.
51. Muthumala, Chaminda and De Silva, Sudhira and Arunakumara, K.K.I.U. and Alwis, P.L.A.G,( 2018), Investigate the Most Suitable Glue Type for Finger-Joints Production in Sri Lanka (May 26, 2018). Journal of Materials Research and Technology. Available at SSRN: https://ssrn.com/abstract=3185609
52. Chaminda muthumala, Sudhira de Silva, P.L.A.G Alwis, K.K.I.U. Arunakumara (2018), Identification of joint efficiencies in finger jointed timber species, paper presented at the 9th international conference on sustainable built environment (icsbe) 2018 structures laboratory, dept. of civil engineering university of peradeniya, sri lanka. abstract, 13th to 15th December, 2018 at Earl’s Regency Hotel, Kandy
53. S.M.J.P. Dayawansha1,C.V. Muthumala2, P.L.A.G. Alwis1 (2019.),’Finger-jointed Furniture Production as a Solution for Timber Waste Management in Sri Lanka, UVA Wellassa International Research conference [IRCUWU] 2019.
54. Chaminda Muthumala, Sudhira De Silva, P.L.A.G Alwis, K.K.I.U. Arunakumara, ‘Accepted Manuscript No.: ISCA-RJAFS-2018-048, ‘Variation of Density, Flexural Strength and Anatomical features of Finger jointed wood species in Sri Lanka’ International Science Community, Association, (Registered under Ministry of Corporate Affairs, Government of India) Research Journal of Agriculture and Forestry Sciences, An International peer reviewed journal ISSN: 2320 – 6063 .
55. Chaminda Muthumala, Sudhira De Silva, P.L.A.G Alwis, K.K.I.U. Arunakumara, (2018), Identifying the strength grade for finger jointed timber species according to BS 5268-2:2002, organized by Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Nugagoda, Paper presented at the International Symposium on twenty third annual Forestry and environment symposium 2018, held on 23rd and 24th November citrus waskaduwe,
56. Muthumala, C.K., Dulanjalee, M.W.T.C., De Silva Sudhira, Aruna Kumara, K.K.I.U and Alwis P.L.A.G. (2018). Factors affecting the glue strength of finger joints in commonly used timber species in Sri Lanka .International Symposium on Agriculture & Environment-University of Ruhuna. pp. 126-128.
57. Muthumala, C.K., De Silva, Sudhira, Aruna Kumara, K.K.I.U. and Alwis, P.L.A.G. 2018. Identifying the Strength grade for finger jointed timber species according to BS 5268-2:2002, International Forestry & Environmental Symposium, USJP. pp. 87.
58. Bandara KMTS, BM Jinendra, NK Hettiarachchi PLAG Alwis, , Comparison of Operating Force Required for Traditional Cinnamon (Cinnamomum zeylanicum) Peeling Processes with Respect to Diameter and Peelability of Sticks. Accepted to present at the International Symposium on Agriculture and Environment 2019 University of Ruhuna, Sri Lanka.
59. KMTS Bandara, BM Jinendra, PLAG Alwis, NK Hettiarachchi and KGG Wijesinghe,( 2018) Acceptance of the manuscript titled “Investigation of the Vibration Assistance on the Back peeling tool to reduce the force required for Cinnamon (Cinnamomum zeylanicum) peeling” Research Journal of Tropical Agricultural Research and Extension 2019 University of Ruhuna, Sri Lanka.
60. KMTS Bandara, BM Jinendra, PLAG Alwis, NK Hettiarachchi and KGG Wijesinghe,( 2018) ‘Comparison of Vibration power applied into a modified bark peeling tools for the reduction force required for cinnamon processing (Cinnamomum zeylanicum)’. At the International Symposium on Agriculture and Environment 2019, University of Ruhuna, Sri Lanka.
61. Chaminda Muthumala, Sudhira De Silva, P.L.A.G Alwis, K.K.I.U. Arunakumara, (2019), Evaluation of the major failure modes of the Non structural Finger jointed Timber species under tensile test at the International Symposium on Agriculture and Environment 2019, University of Ruhuna, Sri Lanka.
62. Muthumala, C. K., De Siva, Sudhira, Arunakumara, K.K.I.U. and Alwis, P.L.A.G. 2019.Classification of Finger Joint Timber Based on Strength Index. Vidyodaya Journal of Science, University of Sri Jayewardenepura, Vol.22 02(2019) pp.32-42.
63. Muthumala, C.K, De Silva, Sudhira., Aruna Kumara, K.K.I.U. and Alwis, P.L.A.G. 2019. Evaluation of the major failure modes of the non- structural finger jointed timber species under tensile test. International Symposium on Agriculture & Environment-University of Ruhuna. pp. 80.
64. Muthumala, C. K., De Siva, Sudhira and Arunakumara, KKIU and Alwis, P.L.A.G. 2019. Variation of density, flexural strength and anatomical features of finger jointed wood products in Sri Lanka .International Conference on “Wood Science and Engineering in the Third Millennium” – ICWSE , Romania. pp.635-642.
65. Chaminda Muthumala, Sudhira De Silva, P.L.A.G Alwis, K.K.I.U. Arunakumara, (2019), Factors Affecting the Glue strength of Finger-joints in commonly used Timber species in Sri Lanka. under at the International Symposium on Agriculture and Environment 2019, University of Ruhuna, Sri Lanka.
66. Dissanayak S G C, KMTS Bandara, , PLAG Alwis,(2019), Design and development Vacuum pressure operating type remote controlled precision Paddy Seeder, at the International Symposium on Agriculture and Environment 2019, University of Ruhuna, Sri Lanka.
67. C.K. Muthumala, Sudhira De Silva, K.K.I.U. Arunakumara, P.L.A.G Alwis, (2019), Identification of Joint efficiencies in 13mm Finger Jointed Timber Species Used in Sri Lanka, Accepted to publish Research Journal of ‘Springer Nature’ 2020,
68. HGCP Bandara, KMTS Bandara, , PLAG Alwis,
(2019), Design and development of prime mover mounted pneumatic Paddy Seeder, at the International Symposium on Agriculture and Environment 2019, University of Ruhuna, Sri Lanka.
69. Muthumala, C. K., Sudhira, De Siva, Arunakumara, K.K.I.U. and Alwis, P.L.A.G. 2019. Identifying the strength grade for finger jointed timber species according to BS 5268-2:2002, Journal of Tropical Forestry and Environment Vol. 9, No. 02.pp.55-64.
70. Muthumala, C. K. Sudhira, DeSiva and Arunakumara, KKIU and Alwis, P.L.A.G. 2019.Finger Jointed Wood products: A new platform for sustainable use of timber, Biodiversity Conservation, Asia Pacific conference, Thulhiriya. pp.241
71. Muthumala, C. K., Sudhira, DeSiva, Alwis, P.L.A.G. and Arunakumara, K.K.I.U. 2018. Effect of finger joining on flexural strength of commonly used timber species in sri lanka Tropical Agricultural Research & Extension, 21 (3 & 4): 2018. pp 27-32.
72. Muthumala, C.K., Arunakumara, K.K.I.U., De Silva, Sudhira, Alwis, P.L.A.G.2019. Assessment of finger-joint efficiencies in Sri Lankan timber species, The Sri Lanka Forester, Forest department, Sri Lanka. vol: 40.
73. Muthumala C.K, G S Y De Silva, Arunakumara K.K.I.U and Alwis P.L.A.G. 2020. Investigation of the best joint type for combining of the finger jointed timber panel in board production. International Conference on Sustainable Build Environment, Kandy, Sri Lanka.
74. . Muthumala C.K, Sudhira De Silva, K.K.I.U. Arunakumara and P.L.A.G. Alwis., 2020. Finger-joint technique to mitigate climate change, NeelaHaritha Vol.3, 2020, Climate Change Secretariat, Ministry of Environment, Sri Lanka. pp. 147-152.
75. Muthumala, C.K., De Silva, Sudhira, Aruna Kumara, K.K.I.U. and Alwis, P.L.A.G. 2018. Identifying the Strength grade for finger jointed timber species according to BS 5268-2:2002, International Forestry & Environmental Symposium, USJP. pp. 87.
76. Muthumala, C.K., De Silva, Sudhira, Aruna Kumara, K.K.I.U and Alwis, P.L.A.G. 2018.Investigate the most suitable glue type for finger-joint production in Sri Lanka,
Research Journal of Agriculture and Forestry Sciences-ISCA-India. pp.6-9
77. Abeyrathna K. H. D, Alwis P. L. A. G, and. Hettiarachchi N. K, EVALUATION OF THE PERFORMANCE OF POWER TILLER MOUNTED FERTILIZER APPLICATOR ON VARIABLE APPLICATION RATE,2nd National Symposium on Agro-Technology and Rural Sciences – 2021, University of Colombo Institute for Agro-Technology and Rural Sciences – Sri Lanka
78. Abeyrathna KHD, Thilanka Ariyawansha, Alwis PLAG and Hettiarachchi NK, Design, Development and Testing of a Direct Driven Two-wheel Tractor Operated Two-row Metering Mechanism for Sugarcane Fertilizer Applications, Rajarata University Journal, Volume-6 ISSN: 2362-0080,Issue-I Rajarata University Journal, June-2021 www.ruj.ac.lk/journal
• 1998 : “”Revitalization of cinnamon industry in Sri Lanka ; Constraints and remedies”” Organized by the section B of SLAAS (Sri Lanka Association for the Advancement of Science in collaboration with Faculty of Agriculture, University of Ruhuna and Department of Export Agriculture.
• 1998 : International Workshop on Agricultural Research Management sponsored by NSF and CARF at PGIA Peradeniya, Sri Lanka.
• 1999 : International Workshop on the design, performance and marketability of biogas systems. Organized by the Dept. of Agricultural Engineering, Faculty of Agriculture, University of Ruhuna, Sri Lanka.
• 02.07.1999 : “”Product diversification and quality improvement of export Agricultural crops”” Organized by the section b of SLAAS in collaboration with Faculty of Agriculture, University of Ruhuna.