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Dr Thiagarajah Ramilan staff profile picture

Contact details +64 (06) 356 9099  ext. 86266

Dr Thiagarajah Ramilan

Senior Lecturer in Agribusiness

School of Agriculture and Environment

Ramilan is a senior lecturer in Agribusiness, programme leader for Agribusiness Value Chains course for ASEAN region. and is the current President for the New Zealand Agricultural and Resource Economics Society (NZARES) for 2020/21. He has many peer-reviewed outputs in the research areas of environmental policy, water economics, climate change and development agriculture. Besides New Zealand, he has worked in South Asia, East Asia, Africa and Australia. He was an international Scientist at CGIAR and currently a senior Honorary fellow at the University of Melbourne.  He develops bioeconomic models to evaluate the implications of technology change in Agri-food value chains.

Research Expertise

Research Interests

Bioeconomic modelling of Agrifood  Systems  using mathematical programming

Modelling of  Agri food value chains using Systems Dynamics

Development of decision tools

Thematics

Future Food Systems

Area of Expertise

Field of research codes
Agricultural And Veterinary Sciences (070000):
Agricultural Economics (140201):
Agricultural Production Systems Simulation (070103): Agricultural Spatial Analysis and Modelling (070104): Agricultural Systems Analysis and Modelling (070105): Agriculture, Land and Farm Management (070100):
Applied Economics (140200): Economics (140000): Environment and Resource Economics (140205):
Farm Management, Rural Management and Agribusiness (070106): Farming Systems Research (070107): Sustainable Agricultural Development (070108)

Keywords

.Agri food value chain, Farm Systems, Mathematical  Programming, Systems dynamic modelling

Research Projects

Summary of Research Projects

Position Current Completed
Project Leader 1 1

Research Outputs

Journal

Sinnetta, A., Malcolm, B., Farquharson, R., & Ramilan, T. (2020). A Moveable Harvest: An investigation into using mobile platforms for picking apples. Australian Farm Business Management Journal. 17(1)
[Journal article]Authored by: Ramilan, T.
Pembleton, KG., Cullen, BR., Rawnsley, RP., & Ramilan, T. (2020). Climate change effects on pasture-based dairy systems in south-eastern Australia. Crop and Pasture Science.
[Journal article]Authored by: Ramilan, T.
Farrell, LJ., Tozer, PR., Kenyon, PR., Ramilan, T., & Cranston, LM. (2020). Producing higher value wool through a transition from Romney to Merino crossbred ii: Cashflow and profit. Small Ruminant Research. 192
[Journal article]Authored by: Ramilan, T., Tozer, P.
Farrell, LJ., Tozer, PR., Kenyon, PR., Ramilan, T., & Cranston, LM. (2020). Producing higher value wool through a transition from Romney to Merino crossbred i: Flock dynamics, feed demand, and production of lambs and wool. Small Ruminant Research. 192
[Journal article]Authored by: Cranston, L., Ramilan, T., Tozer, P.
Dusingizimana, T., Weber, JL., Ramilan, T., Iversen, PO., & Brough, L. (2020). A qualitative analysis of infant and young child feeding practices in rural Rwanda. Public Health Nutrition.
[Journal article]Authored by: Brough, L., Ramilan, T., Weber, J.
Farrell, LJ., Kenyon, PR., Tozer, PR., Ramilan, T., & Cranston, LM. (2020). Quantifying sheep enterprise profitability with varying flock replacement rates, lambing rates, and breeding strategies in New Zealand. Agricultural Systems. 184
[Journal article]Authored by: Cranston, L., Ramilan, T., Tozer, P.
Chandrakumar, C., Malik, A., McLaren, SJ., Owsianiak, M., Ramilan, T., Jayamaha, NP., . . . Lenzen, M. (2020). Setting Better-Informed Climate Targets for New Zealand: The Influence of Value and Modeling Choices. Environmental Science and Technology. 54(7), 4515-4527
[Journal article]Authored by: Jayamaha, N., McLaren, S., Ramilan, T.
Chandrakumar, C., McLaren, SJ., Malik, A., Ramilan, T., & Lenzen, M. (2020). Understanding New Zealand’s consumption-based greenhouse gas emissions: an application of multi-regional input-output analysis. International Journal of Life Cycle Assessment. 25(7), 1323-1332
[Journal article]Authored by: McLaren, S., Ramilan, T.
Kumar, S., Craufurd, P., Haileslassie, A., Ramilan, T., Rathore, A., & Whitbread, A. (2019). Farm typology analysis and technology assessment: An application in an arid region of South Asia. Land Use Policy. 88
[Journal article]Authored by: Ramilan, T.
Farrell, LJ., Tozer, PR., Kenyon, PR., Ramilan, T., & Cranston, LM. (2019). The effect of ewe wastage in New Zealand sheep and beef farms on flock productivity and farm profitability. Agricultural Systems. 174, 125-132
[Journal article]Authored by: Cranston, L., Kenyon, P., Ramilan, T., Tozer, P.
Chandrakumar, C., McLaren, SJ., Jayamaha, NP., & Ramilan, T. (2019). Absolute Sustainability-Based Life Cycle Assessment (ASLCA): A Benchmarking Approach to Operate Agri-food Systems within the 2°C Global Carbon Budget. Journal of Industrial Ecology. 23(4), 906-917
[Journal article]Authored by: Jayamaha, N., McLaren, S., Ramilan, T.
Stewart, TM., Ramilan, T., & Yu, F. (2017). Assessing the "user-friendliness" of biopesticides and their conventional pesticide counterparts: A "proof-of-concept" framework for comparing pesticide groups. New Zealand Plant Protection. 70, 152-159
[Journal article]Authored by: Ramilan, T.
Haileslassie, A., Craufurd, P., Ramilan, T., Kumar, S., Whitbread, A., Rathor, A., . . . Kakumanu, KR. (2017). Empirical evaluation of sustainability of divergent farms in the dryland farming systems of India. Ecological Indicators. 60, 710-723
[Journal article]Authored by: Ramilan, T.
Farquharson, RJ., Freebairn, JW., Webb, JA., Stewardson, MJ., & Ramilan, T. (2017). An Economic Framework for Sharing Water Within a River Catchment. Water Economics and Policy. 3(3)
[Journal article]Authored by: Ramilan, T.
Kumar, S., Ramilan, T., Ramarao, CA., Rao, CS., & Whitbread, A. (2016). Farm level rainwater harvesting across different agro climatic regions of India: Assessing performance and its determinants. Agricultural Water Management. 176, 55-66
[Journal article]Authored by: Ramilan, T.
Pembleton, KG., Cullen, BR., Rawnsley, RP., Harrison, MT., & Ramilan, T. (2016). Modelling the resilience of forage crop production to future climate change in the dairy regions of Southeastern Australia using APSIM. Journal of Agricultural Science. 154(7), 1131-1152
[Journal article]Authored by: Ramilan, T.
Kumar, S., Raju, BMK., Ramarao, CA., & Ramilan, T. (2015). Sensitivity of livestock production to climatic variability under Indian drylands and future perspective. Current Agriculture Research Journal. 3(2), 142-149
[Journal article]Authored by: Ramilan, T.
Anwar, MR., Liu, DL., Farquharson, R., Macadam, I., Abadi, A., Finlayson, J., . . . Ramilan, T. (2015). Climate change impacts on phenology and yields of five broadacre crops at four climatologically distinct locations in Australia. Agricultural Systems. 132, 133-144
[Journal article]Authored by: Ramilan, T.
Wossen, T., Berger, T., Swamikannu, N., & Ramilan, T. (2014). Climate variability, consumption risk and poverty in semi-arid Northern Ghana: Adaptation options for poor farm households. Environmental Development. 12, 2-15
[Journal article]Authored by: Ramilan, T.
Doole, GJ., Marsh, D., & Ramilan, T. (2013). Evaluation of agri-environmental policies for reducing nitrate pollution from New Zealand dairy farms accounting for firm heterogeneity. Land Use Policy. 30(1), 57-66
[Journal article]Authored by: Ramilan, T.
Pembleton, KG., Rawnsley, RP., Jacobs, JL., Mickan, FJ., O'Brien, GN., Cullen, BR., . . . Ramilan, T. (2013). Evaluating the accuracy of the Agricultural Production Systems Simulator (APSIM) simulating growth, development, and herbage nutritive characteristics of forage crops grown in the south-eastern dairy regions of Australia. Crop and Pasture Science. 64(2), 147-164
[Journal article]Authored by: Ramilan, T.
Ramilan, T., Scrimgeour, F., & Marsh, D. (2012). Using Microsimulation to Maximise Scarce Survey Data: Applications for Catchment Scale Modelling and Policy Analysis. Environmental Modeling and Assessment. 17(4), 399-410
[Journal article]Authored by: Ramilan, T.
Ramilan, T., Scrimgeour, FG., Levy, G., Marsh, D., & Romera, AJ. (2011). Simulation of alternative dairy farm pollution abatement policies. Environmental Modelling and Software. 26(1), 2-7
[Journal article]Authored by: Ramilan, T.
Doole, GJ., Ramilan, T., & Pannell, DJ. (2011). Framework for evaluating management interventions for water-quality improvement across multiple agents. Environmental Modelling and Software. 26(7), 860-872
[Journal article]Authored by: Ramilan, T.

Book

Ramilan, T., Farquharson, R., Abadi, A., Finlayson,, J., Liu, DL., Muhuddin,, A., . . . McGrath, J.(2013). EverFarm: Climate adapted perennial-based farming systems for dryland agriculture in southern Australia. : National Climate Change Adaptation Research Facility
[Authored Book]Authored by: Ramilan, T.

Report

Farquharson, R., Goodwin, I., O’Connell, M., & Ramilan, T.(2016). Analysis of tactical farm-level decisions for irrigation water management in horticultural production.
[Technical Report]Authored by: Ramilan, T.

Conference

Ramilan, T., Scrimgeour, F., & Marsh, D.Measuring environmental-economic efficiency in the Karapiro catchment, New Zealand. 18th World IMACS Congress and MODSIM 2009 - International Congress on Modelling and Simulation: Interfacing Modelling and Simulation with Mathematical and Computational Sciences, Proceedings. (pp. 1181 - 1187).
[Conference]Authored by: Ramilan, T.
Chandrakumar, C., Malik, A., McLaren, S., Lenzen, M., Ramilan, T., & Jayamaha, NP.(2018, October). New Zealand Agri-Food Sector and Absolute Climate Impacts: An Application of Multi-Regional Input-Output Analysis. .
[Conference]Authored by: Jayamaha, N., McLaren, S., Ramilan, T.
Ramilan, T., Farquarson, R., Thar, S., Than, S., & Aung, M.(2017, February). Characterisation of farming systems in Central Myanmar. .
[Conference]Authored by: Ramilan, T.
Ramilan, T., Farquarson, R., Thar, S., Than, S., & Aung, M. (2017). Characterisation of farming systems in Central Myanmar. , Australian Agricultural and Resouce Economics
[Conference Abstract]Authored by: Ramilan, T.
Ramilan, T., Farquharson, R., Thar, S., Than, S., & Aung, M. (2017). Characterisation of farming systems in Central Myanmar. , Australaian Agricultural and Resouce Economic Soceity
[Conference Abstract]Authored by: Ramilan, T.
Farquharson, R., Ramilan, T., Thar, S., Than, S., & Aung, N.Nitrogen for smallholders and cereal crops in Myanmar: Economic and social dimensions for fertility decisions. . Brisbane, Australia
[Conference Paper]Authored by: Ramilan, T.
Ramilan, T., Farquharson, R., Goodwin, I., & O’Connell, G. (2016). Ex ante analysis of irrigation interventions in Orchards. , New Zealand Agricultural and Resource Economics Society
[Conference Abstract]Authored by: Ramilan, T.
Farquharson, R., Chen, D., Yong, L., Liu, D., & Ramilan, T.Nitrogen decisions for cereal crops: a risky and personal business. Paper presented at the meeting of Proceedings of the 2016 International Nitrogen Initiative Conference, "Solutions to improve nitrogen use efficiency for the world", 4. Melbourne, Australia
[Conference Paper]Authored by: Ramilan, T.
Farquharson, RJ., Freebairn, JW., Webb, JA., Stewardson, MJ., & Ramilan, T.Allocating limited water: Linking ecology and economics. Proceedings - 21st International Congress on Modelling and Simulation, MODSIM 2015. (pp. 2255 - 2261).
[Conference]Authored by: Ramilan, T.
Farquharson, R., Abadi, A., Finlayson, J., Ramilan, T., Liu, DL., Anwar, M., . . . Clark, S.Modelling to evaluate agricultural adaptation to climate change in southern Australia. Proceedings - 20th International Congress on Modelling and Simulation, MODSIM 2013. (pp. 2366 - 2372).
[Conference]Authored by: Ramilan, T.
Ramilan, T., Scrimgeour, F., & Marsh, D.Analysis of environmental and economic efficiency using a farm population micro-simulation model. Mathematics and Computers in Simulation. 81 (7)(pp. 1344 - 1352). 0378-4754.
[Conference]Authored by: Ramilan, T.
George, B., Adams, R., Ramilan, T., Costelloe, J., Sammonds, M., Vietz, G., . . . Western, A.An integrated modeling framework to evaluate water allocation strategies in the Broken catchment, Victoria. MODSIM 2011 - 19th International Congress on Modelling and Simulation - Sustaining Our Future: Understanding and Living with Uncertainty. (pp. 4099 - 4105).
[Conference]Authored by: Ramilan, T.
Ramilan, T., Farquharson, R., George, B., Sammonds, M., Vietz, G., Yen, J., . . . Western, A.An environmental economic assessment of water sharing alternatives for the Broken catchment in the Northern Victoria. MODSIM 2011 - 19th International Congress on Modelling and Simulation - Sustaining Our Future: Understanding and Living with Uncertainty. (pp. 1386 - 1392).
[Conference]Authored by: Ramilan, T.
Ramilan, T., Scrimgeour, F., & Marsh, D.Measuring environmental-economic efficiency in the Karapiro catchment, New Zealand. 18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation: Interfacing Modelling and Simulation with Mathematical and Computational Sciences, Proceedings. (pp. 1181 - 1187).
[Conference]Authored by: Ramilan, T.
Ramilan, T., Scrimgeour, FG., Levy, G., & Romera, AJ.Modelling economic impact of agri-environmental policy on dairy farms - A catchment perspective. MODSIM07 - Land, Water and Environmental Management: Integrated Systems for Sustainability, Proceedings. (pp. 1089 - 1095).
[Conference]Authored by: Ramilan, T.

Teaching and Supervision

Teaching Statement

Programme  Leader--FOOD AND AGRIBUSINESS VALUE CHAINS Course

Courses Coordinated

  • 112.248 Food and Agribusiness Value Chains

Summary of Doctoral Supervision

Position Current Completed
Main Supervisor 1 0
Co-supervisor 10 3

Current Doctoral Supervision

Main Supervisor of:

  • David Ahiamadia - Doctor of Philosophy
    Improving on-farm decision making under climate change uncertainties in Ghana.

Co-supervisor of:

  • Sanduni Rathnayake - Doctor of Philosophy
    Farmer Business School Extension Approach for Livelihood Development in Small Holder Farmers:Experiences from Sri LankaFarmer Business School Extension Approach for Livelihood Development in Small Holder Farmers:Experiences from Sri Lanka
  • Sujirtha Nadarajah Vishnukumar Vishnukum - Doctor of Philosophy
    Evaluation of the Effect of the Nutritious Vegetable Gardens on Nutritional and Economic Status of Rural Households
  • Joseph Ajayi - Doctor of Philosophy
    The Governance and Performance of Cooperatives among Cassava-based Entrepreneurs in Nigeria
  • Priyanath Jayasinghe Mudiyanselage - Doctor of Philosophy
    Investigating the tropical forage species for improving the dairying in Sri Lanka
  • Morteza Ghahremani - Doctor of Philosophy
    Bio-ecomomic modelling of New Zealand agri-food systems
  • Humphrey Walker - Doctor of Philosophy
    Holistic welfare estimation of freshwater and public trust in New Zealand: A common good case study
  • Theogene Dusingizimana - Doctor of Philosophy
    Investigating food based strategies to improve children’s diet and nutritional status in Rwanda
  • Thivahary Thivahary Geretharan - Doctor of Philosophy
    Smallholder farmers’ agricultural support system in Northern Sri Lanka
  • Nadeesha Jayasena Thenuwara Acharige - Doctor of Philosophy
    Smallholders participation in milk markets in Sri Lanka
  • Alberthuge Prageeth Sanjaya Fernando - Doctor of Philosophy
    Vertical integration of cooperatives and benefits to stallholder rice farmers in Sri Lanka

Completed Doctoral Supervision

Co-supervisor of:

  • 2020 - Lydia Farrell - Doctor of Philosophy
    Bio-economic system-dynamics modelling to investigate strategic management options in New Zealand sheep farming enterprises.
  • 2019 - Chanjief Chandrakumar - Doctor of Philosophy
    Evaluation of New Zealand’s Absolute Environmental Sustainability Performance: Development and Application of a Method to Assess the Climate Change Performance of New Zealand's Economic Sectors
  • 2019 - Thomas Cushnahan - Doctor of Philosophy
    Hyperspectral imaging of hill country farms

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