Prof. D.A.L. Leelamanie
+94 71 861 4380

Prof. D.A.L. Leelamanie

Senior Professor (Chair)
Department of Soil Science,
Faculty of Agriculture, University of Ruhuna,
Mapalana, Kamburupitiya,
Sri Lanka 81100
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Research Interests
Soil Physical Properties Soil Water Repellency Soil Organic Matter Soil Aggregate Stability Soil Hydrology
Qualifications

Biography

Prof. D.A.L. Leelamanie is a Senior Professor (Chair) in the Department of Department of Soil Science, Faculty of Agriculture, University of Ruhuna. Research interests include Soil Physics and Soil Water Repellency.

Journal Publications

Total: 66
01
Leelamanie, D. A. L., Piyaruwan, H. I. G. S., Jayasinghe, P. K. S. C., & Senevirathne, P. A. N. R. (2021). Hydrophysical characteristics in water-repellent tropical Eucalyptus, Pine, and Casuarina plantation forest soils. Journal of Hydrology and Hydromechanics, 69(4), 447-455.
02
N.R.R.W.S. Rathnayake, D.A.L. Leelamanie . (2021). Determining threshold levels of soil physical indicators of compaction on crop growth. Proceedings of Young Graduates’ Forum of the ISAE-, 2021, September 03, 2021.
03
P.A.N.R. Senevirathne and D.A.L. Leelamanie . (2021). Surface and sub-surface hydraulic properties of water-repellent dune sand under Casuarina shelterbelt in dry zone, Sri Lanka. Proceedings of Young Graduates’ Forum of the ISAE-, 2021, September 03, 2021.
04
K. A. B. M. Kulasinghe and D.A.L. Leelamanie . (2021). Impacts of heat-induced alterations in water repellency on aggregate sizes and particle size fractions in a Eucalyptus forest soil. Proceedings of Young Graduates’ Forum of the ISAE-, 2021, September 03, 2021.
05
Wasana, P. G. U. N., Samarawickrama, U. I., & Leelamanie, D. A. L. (2021). Effects of intermixed water repellent materials on hydrophysical characteristics in potting media. International Halich Congress on Multidisciplinary Scientific Research August 15-16, 2021, Istanbul, Turkey.
06
Perera, H. T. M., & Leelamanie, D. A. L. (2021). ‘Heating Temperature at short-term exposure affected water repellency and stability of aggregates in Eucalyptus forest soils’, Proceedings of the 2nd International Sciences and Innovation Congress 2021, Ankara, Turkey, 2021 pp. 66.
07
Piyaruwan, H. I. G. S., & Leelamanie, D. A. L. (2021). ‘water-dependent repellency in a Eucalyptus plantation forest soil in upcountry Sri Lanka’, Proceedings of the ISAE 2021, Faculty of Agriculture, University of Ruhuna, Sri Lanka 2021 pp. 24.
08
Perera, H. T. M., & Leelamanie, D. A. L. (2021). ‘Stability and erodibility of model aggregates as affected by water repellency and heating duration’, Proceedings of the ISAE 2021, Faculty of Agriculture, University of Ruhuna Sri Lanka 2021 pp. 34.
09
Leelamanie, D. A. L., Jayasinghe, P. K. S. C., Liyanage, T. D. P., & Samarawickrama, U. I. (2021). ‘characterizing Spatial Distribution Patterns of Soil Water Repellency in a Eucalyptus Forest Soil using GIS and Remote Sensing’, Proceedings of the 18th Academic Sessions University of Ruhuna, March, 2021.
10
Rupasinghe, I. S. U., Abeysinghe, A. A. R. W., Amarasinghe, S. R., & Leelamanie, D. A. L. (2021). ‘influence of Bio-char Addition on pH and EC of Municipal Solid Waste Compost’, Proceedings of the 18th Academic Sessions University of Ruhuna, March, 2021.
11
Piyaruwan, H. I. G. S., Jayasinghe, P. K. S. C., & Leelamanie, D. A. L. (2020). Water repellency in eucalyptus and pine plantation forest soils and its relation to groundwater levels estimated with multi-temporal modeling. Journal of Hydrology and Hydromechanics, 68(4), 382-391.
12
Piyaruwan, H. I. G. S., & Leelamanie, D. A. L. (2020). Existence of water repellency and its relation to structural stability of soils in a tropical Eucalyptus plantation forest. Geoderma, 380, 114679.
13
Rupasinghe, I. S. U., & Leelamanie, D. A. L. (2020). Comparison of municipal and agriculture-based solid waste composts: short-term crop-yield response and soil properties in a tropical Ultisol. Biologia, 75(6), 809-818.
14
Perera, H. T. M., Nishiwaki, J., & Leelamanie, D. A. L. (2020). ‘Difference in carbon dioxide movement between till and no-till systems during the transition period of autumn to winter in andisols, Japan’, Proceedings of Young Graduates’ Forum of the International Symposium on Agriculture and Environment- 2020, Faculty of Agriculture, University of Ruhuna, Sri Lanka pp. 07.
15
Archana, H. L. M., Nishiwaki, J., & Leelamanie, D. A. L. (2020). ‘effects of Tillage on Water Movement in Japanese Andisols’, Proceedings of Young Graduates’ Forum of the International Symposium on Agriculture and Environment- 2020, Faculty of Agriculture, University of Ruhuna, Sri Lanka pp. 07.
16
J.K.P.N. Prathibha, U.I. Samarawickrama, D.A.L. Leelamanie 2020: Hydrophobic Effects on Organic Matter Retention in Potting Media. Proceedings of the International Symposium on Agriculture and Environment, Faculty of Agriculture, University of Ruhuna, February 14, 2020. P65
17
J.K.P.N. Prathibha, U.I. Samarawickrama, D.A.L. Leelamanie 2020: Hydrophobic Effects on Water Retention in Potting Media, 17th Academic Sessions, University of Ruhuna, March 04, 2020. P 7
18
Leelamanie, D. A. L., & Manawardana, C. U. (2019). Soil hydrophysical properties as affected by solid waste compost amendments: seasonal and short-term effects in an Ultisol. Journal of Hydrology and Hydromechanics, 67(3), 232-239.
19
Leelamanie, D. A. L., & Nishiwaki, J. (2019). Water repellency in Japanese coniferous forest soils as affected by drying temperature and moisture. Biologia, 74(2), 127-137.
20
T.D.P. Liyanage, D.A.L. Leelamanie 2019: Assessment of Potential Water Repellency of Litter Components in Casuarina equisetifolia Plants. 16th Academic Sessions, University of Ruhuna, P: 51.
21
T.D.P. Liyanage, T. Jayasinghe, E.M.I. Prasad, S.K.P. Manujaya, D.A.L. Leelamanie 2019: Effects of organic and inorganic amendments on salinity levels of Municipal Solid Waste Composts in Sri Lanka. Proceedings of the International Symposium on Agriculture and Environment (ISAE) 2019, Faculty of Agriculture, University of Ruhuna, Sri Lanka, ISSN: 1800-4830, Pp: 92.
22
H.I.G.S. Piyaruwan, D.A.L. Leelamanie 2018: Seasonal changes of soil water repellency in pine and eucalyptus forest soils in Up country Sri Lanka. 23rd International forestry and environment symposium, University of Sri Jayawardhanapura
23
H.I.G.S. Piyaruwan, D.A.L. Leelamanie 2018: Influence of soil water repellency on initial infiltration rate and unsaturated hydraulic conductivity of an Ultisol under Pinus caribaea. International Research Symposium on Pure and Applied Sciences, University of Kelaniya
24
H.I.G.S. Piyaruwan, D.A.L. Leelamanie 2018: Soil profile moisture distribution in relation to water repellency in an upcountry Eucalyptus plantation forest soil in Sri Lanka. 15th Academic Sessions, University of Ruhuna
25
T.D.P. Liyanage, B.P.A.U. Nilupuli, D.A.L. Leelamanie 2018: Effects of moisture content on the hardness level measurements of the soil. Proceedings of the Wayamba University International Conference, Sri Lanka, ISBN: 978-955-7442-19-8, Pp: 325
26
T.D.P. Liyanage, D.A.L. Leelamanie 2018: Relationship between crop yield and the aggregate stability of organic manure amended Red Yellow Podzolic soils. 15th Academic Sessions, University of Ruhuna, ISSN: 2362-0412, Pp: 49
27
Piyaruwan HIGS., Leelamanie DAL 2018 Onsite moisture levels of soil profile in relation to water repellency in upcountry Eucalyptus plantation forest soils. 15th Academic Sessions, University of Ruhuna, March 07, 2018.
28
Rupasinghe ISU, Leelamanie DAL 2018 Effects of municipal and agriculture-based waste compost on crop yield response in low-country wet zone. 15th Academic Sessions, University of Ruhuna, March 07, 2018
29
Liyanage, T. D. P., & Leelamanie, D. A. L. (2017). Availability of major nutrients in an Ultisol in Southern Sri Lanka treated with selected organic amendments intermixed with hydrophobic organic manure. Tropical Agricultural Research and Extension ., 20, 333-342.
30
Piyaruwan HIGS., Leelamanie DAL 2017 Surface Water Entry and Water Retention of Soil in Relation to Water Repellency in Ohiya Eucalyptus Forest. 14th Academic Sessions, University of Ruhuna, March 01, 2017
31
Rupasinghe ISU, Leelamanie DAL 2017 Tomato Seed Germination Index for Determining Phytotoxicity in Municipal Solid Waste Compost in Sri Lanka: Effects of pH and EC. 14th Academic Sessions, University of Ruhuna, March 01, 2017
32
Liyanage TDP, Leelamanie DAL 2017 Effects of Organic Amendments and Subsequent Potential Water Repellent Conditions on Major Nutrient Dynamics in Soil. 14th Academic Sessions, University of Ruhuna, March 01, 2017
33
Liyanage TDP, Leelamanie DAL 2017 Water repellent effects of organic amendments on saturated hydraulic conductivity of surface Ultisols. Proceedings of the International Symposium on Agriculture and Environment, Faculty of Agriculture, University of Ruhuna, January, 2017
34
Leelamanie, D. A. L., & Liyanage, T. D. (2016). Water repellent effects of manure amended soils on organic matter decomposition, C retention, and respired CO2-C. Biologia, 71(9), 996-1001.
35
Liyanage, T. D. P., & Leelamanie, D. A. L. (2016). Influence of organic manure amendments on water repellency, water entry value, and water retention of soil samples from a tropical Ultisol. Journal of Hydrology and Hydromechanics, 64(2), 160.
36
Leelamanie, D. A. L. (2016). Occurrence and distribution of water repellency in size fractionated coastal dune sand in Sri Lanka under Casuarina shelterbelt. Catena, 142, 206-212.
37
Leelamanie D.A.L., P.K.S.C. Jayasinghe 2016 Time Dependence of Soil-water contact angle in Pine and Eucalyptus forest soils in Sri Lanka. 3rd Kuala Lumpur International Agriculture, Forestry and Plantation Conference, Kuala Lumpur, Malaysia. May 21-22, 2016
38
Weralugolla S.S.S., D.N. Sirisena, Leelamanie D.A.L. 2016 Uptake capacities and partitioning efficiencies of Iron and Zink among three months age rice varieties. Proceedings of the Students Session of International Symposium on Agriculture and Environment (ISAE 2016), Faculty of Agriculture, University of Ruhuna, January 2016
39
Leelamanie, D. A. L., & Nishiwaki, J. (2016). Occurrence and behavior of water repellency in Japanese Andisols under coniferous forest soils. Proceedings of 4 th Conference on Sri Lanka-Japan Collaborative Research, August, 2016.
40
Leelamanie D.A.L., T.D.P. Liyanage, H.I.G.S. Piyaruwan 2016 Occurrence and Distribution of Water Repellency in soils under Exotic Plantation Forests in Sri Lanka. 13th Academic Sessions, University of Ruhuna, March 02, 2016. ISSN: 2362-0412
41
Leelamanie D.A.L., T.D.P. Liyanage, I.M.L.V. Rajarathne 2016: Contrastive Evaluation of Laboratory Test Procedures used in Determining Organic Matter Content in Soils, 13th Academic Sessions, University of Ruhuna, March 02, 2016
42
T.D.P. Liyanage, Leelamanie D.A.L. 2016: Water Entry and Retention of Ultisols Treated with Low Energy Organic Manure, 13th Academic Sessions, University of Ruhuna, March 02, 2016. ISSN: 2362-0412
43
Liyanage T.D.P., Leelamanie DAL, S.D. Wanniarachchi 2016: Soil Microbial Activity as Affected by the Soil-Water Contact Angles, 13th Academic Sessions, University of Ruhuna, March 02, 2016. ISSN: 2362-0412
44
Rupasinghe ISU, Leelamanie D.A.L. 2016: Distribution of Organic Matter among Particle Size Fractions of Municipal Solid Waste Compost (MSWC) in Sri Lanka, 13th Academic Sessions, University of Ruhuna, March 02, 2016. ISSN: 2362-0412
45
Leelamanie, D. A. L., & Mapa, R. B. (2015). Alterations in soil aggregate stability of a tropical Ultisol as mediated by changes in land use. Biologia, 70(11), 1444-1449.
46
Leelamanie, D. A. L., Liyanage, T. D. P., & Rajarathna, I. M. L. V. (2015). A comparison of weight loss and c analysis methods in determining organic matter content in Sri Lankan soils. Tropical Agricultural Research and Extension, 18(3).
47
Rupasinghe ISU, Leelamanie D.A.L. 2015: Investigation of particle size distribution of municipal solid waste compost in Sri Lanka. International Forestry and Environment Symposium, 2015 ISSN: 2235-9397
48
Leelamanie DAL 2015: Effect of Organic Matter Content at Different Stages of Decomposition on Soil Hydrophobicity. Proceedings of the University of Ruhuna 12th Academic Sessions, March, 2015.
49
T.D.P. Liyanage, Leelamanie DAL, S.D. Wanniarachchi 2015: Effects of Water Repellency on Soil Organic Matter Decomposition by Microbes. Proceedings of the University of Ruhuna 12th Academic Sessions, March, 2015
50
Anuradha, T. G. D., Kendaragama, K. M. A., & Leelamanie, D. A. L. (2015). GIS based Spatial Analysis of Soil Fertility in Rice Lands in the Kiralakele Sub Land System. Proceedings of the Students Session of ISAE, 2014, Faculty of Agriculture, University of Ruhuna, April 2015.
51
Leelamanie, D. A. L. (2014). Initial water repellency affected organic matter depletion rates of manure amended soils in Sri Lanka. Journal of Hydrology and Hydromechanics, 62(4), 309.
52
Leelamanie, D. A. L., & Karube, J. (2014). Surface hydrophobicity of Japanese Andisol and its behavior upon exposure to heat. Soil Science Society of America Journal, 78(3), 761-766.
53
Leelamanie, D. A. L., & Karube, J. (2014). Water stable aggregates of Japanese Andisol as affected by hydrophobicity and drying temperature. Journal of Hydrology and Hydromechanics, 62(2), 97.
54
Leelamanie D.A.L. 2014: Soil-water contact angle of Coastal dune sands in Dry Zone as affected by Intermixed Organic Matter in soil Proceedings of the International Symposium on Agriculture and Environment, Faculty of Agriculture, University of Ruhuna, November, 2014
55
Leelamanie D.A.L., T.D.P. Liyanage 2014: Hydrophysical characterization of naturally water repellent dry zone dune sand in Sri Lanka. Proceedings of the International Symposium on Agriculture and Environment, Faculty of Agriculture, University of Ruhuna, November, 2014
56
T.D.P. Liyanage, D.A.L. Leelamanie, S.D. Wanniarachchi 2014: Effects of Organic Matter Induced Hydrophobici-ty on Microbial activity of soils as measured by CO2 Evolution. Proceedings of the International Symposium on Agriculture and Environment, Faculty of Agriculture, University of Ruhuna, November, 2014
57
Liyanage T.D.P., Leelamanie D.A.L. 2014: Mild Water Repellency Effects on Hydraulic Properties of hydrophobic organic matter incorporated Animal Manure amended soils. Submitted to the 70 th Annual Scientific Sessions of SLAAS, 2014
58
Liyanage T.D.P., Leelamanie D.A.L. 2014: Relationship between water entry value, saturated hydraulic conductivity of organic manure amended soils. Proc. of International Conference on Multidisciplinary Approaches 2014 (ICMA 2014), University of Sri Jayewardenepura, Aug. 2014
59
Leelamanie D.A.L. 2014: Relationship between water repellency, interstitial organic material of sieve fractions from dry-zone dune sands under Casuarina equisetifolia. Proceedings of Peradeniya University International Research Sessions (iPURSE), Faculty of Science, University of Peradeniya, July 2014
60
Liyanage T.D.P., Leelamanie D.A.L. 2014: Hydraulics of Repellency, Wettability of Soils. Proceedings of the Students Session of International Symposium on Agriculture and Environment (ISAE 2013), Faculty of Agriculture, University of Ruhuna, May, 2014
61
Yasoda K.P., K.M.A. Kendaragama, W.M.A.D.B. Wickramaisnghe, Leelamanie D.A.L 2014: Assessing Stream Water Quality of Uma Oya Upper Catchment in Central Highlands of Sri Lanka. Proceedings of the Students Session of International Symposium on Agriculture and Environment (ISAE 2013), Faculty of Agriculture, University of Ruhuna, May, 2014
62
Leelamanie D.A.L., J. Karube 2014: Water Stability of Model Aggregates in relation to the contact angle and wetting rate for Japanese surface Andisol. Proceedings of the University of Ruhuna Academic Sessions, March, 2014
63
Leelamanie D.A.L., T.D.P. Liyanage 2014: Characteristics of Water Dependent Repellency of Soils Amended with Hydrophobic Organic Matter. Proceedings of the University of Ruhuna Academic Sessions, March, 2014
64
Leelamanie D.A.L. 2013: Fine woody debris of Mangifera indica, Alstonia macrophylla,, Calophyllum inophyllum affected soil hydrophobicity. Proceedings of the International Symposium on Minor Fruits and Medicinal Plants, Faculty of Agriculture, University of Ruhuna, December, 2013
65
Leelamanie D.A.L., & Jayasekara PK 2013: Effects of heating on organic matter induced soil water repellency. Proceedings of the International Symposium on Agriculture and Environment, faculty of Agriculture, University of Ruhuna, November, 2013
66
Leelamanie D.A.L., & Dilhani HGC 2013: Time dependent contact angle of soils amended with animal manure, fine woody debris. Proceedings of the International Symposium on Agriculture and Environment, Faculty of Agriculture, University of Ruhuna, November, 2013