Dr Paramsothy (Jeya) Jeyakumar staff profile picture

Contact details +6469517882

Dr Paramsothy (Jeya) Jeyakumar PhD

Senior Research Officer in Soil Chemistry

Doctoral Supervisor
School of Agriculture and Environment

I describe myself as a soil scientist, with specific expertise in the subject area of environmental chemistry. My research objectives align with enhancing the primary sector production and productivity while maintaining soil and water quality, and food safety. My current research projects study heavy metals and essential micronutrients in agricultural products and their effects on the food chain. I developed a great deal of expertise in using metal speciation to assess the bioavailability of trace elements (TE) in soil, and their effects on plants and soil microbial activity.

Professional

Contact details

  • Ph: 84882
    Location: 1.25, Ag Hort B
    Campus: Turitea

Qualifications

  • Doctor of Philosophy - Massey University (2011)

Certifications and Registrations

  • Licence, Supervisor, Massey University

Prizes and Awards

  • AGMARDT Post–Doctoral Scientist: Soil water repellency (SWR) – economic and environmental consequences of an emerging issue of soil degradation’. Plant and Food Research, New Zealand - (2010)
  • ‘Summit-Quinphos’ award for the best final year PhD candidate - New Zealand Society of Soil Science (2009)

Research Expertise

Research Interests

  • Environmental issues of heavy metals bioavailability in soil, water and wastewater system
  • Carbon, phosphorus and nitrogen dynamics in soil and plant
  • Environmental issues in relation to natural disasters
  • Soil–root interface with special concern on Mycorrhiza and soil microorganisms

Thematics

Health and Well-being, Future Food Systems

Area of Expertise

Field of research codes
Environmental Sciences (050000): Soil Sciences (050300)

Keywords

Trace metals

Research Projects

Summary of Research Projects

Position Current Completed
Key Researcher / Named Investigator / Associate Investigator 2 0
Project Leader 1 5
Team Member 0 1

Research Outputs

Journal

Gunaratnam, A., McCurdy, M., Grafton, M., Jeyakumar, P., Davies, CE., & Bishop, P. (2024). A low-cost simple lysimeter soil retriever design for retrieving soil from small lysimeters. Engineering Research Express. 6
[Journal article]Authored by: Grafton, M., Jeyakumar, P.
Matse, D., Geretharan, T., van Gorp, E., Anderson, S., Jeyakumar, P., & Anderson, C. (2024). The Potential Impact of Long-Term Copper Fungicide Sprays on Soil Health in Avocado Orchards. Environments. 11(6)
[Journal article]Authored by: Jeyakumar, P.
Shrestha, G., Calvelo-Pereira, R., Poggio, M., Jeyakumar, P., Roudier, P., Kereszturi, G., . . . Anderson, CWN. (2024). Predicting cadmium fractions in agricultural soils using proximal sensing techniques. Environmental Pollution. 349
[Journal article]Authored by: Anderson, C., Jeyakumar, P., Kereszturi, G.
Jiao, Z., Ge, S., Chen, M., Jeyakumar, P., Wang, H., Xu, X., . . . Wang, Y. (2024). Does livestock-Manure-Derived Biochar Suitable for the Stabilization of Cadmium and Zinc in Contaminated Soil?. Bulletin of Environmental Contamination and Toxicology. 112(4)
[Journal article]Authored by: Jeyakumar, P.
Zhang, J., Li, J., Lin, Q., Huang, Y., Chen, D., Ma, H., . . . Wang, H. (2024). Impact of coconut-fiber biochar on lead translocation, accumulation, and detoxification mechanisms in a soil–rice system under elevated lead stress. Journal of Hazardous Materials. 469
[Journal article]Authored by: Jeyakumar, P.
Li, J., Gao, Y., Li, C., Wang, F., Chen, H., Yang, X., . . . Wang, H. (2024). Pristine and Fe-functionalized biochar for the simultaneous immobilization of arsenic and antimony in a contaminated mining soil. Journal of Hazardous Materials. 469
[Journal article]Authored by: Jeyakumar, P.
Wei, B., Zhang, D., Jeyakumar, P., Trakal, L., Wang, H., Sun, K., . . . Wang, Z. (2024). Iron-modified biochar effectively mitigates arsenic-cadmium pollution in paddy fields: A meta-analysis. Journal of Hazardous Materials. 469
[Journal article]Authored by: Jeyakumar, P.
Wu, R., Jeyakumar, P., Bolan, N., Zhai, X., Wang, H., Pan, M., . . . Dai, K. (2024). Enhanced denitrification driven by a novel iron-carbon coupled primary cell: chemical and mixotrophic denitrification. Biochar. 6(1)
[Journal article]Authored by: Jeyakumar, P.
Li, X., Jeyakumar, P., Bolan, N., Huang, L., Rashid, MS., Liu, Z., . . . Wang, H. (2024). Biochar Derived from Urban Green Waste Can Enhance the Removal of Cd from Water and Reduce Soil Cd Bioavailability. Toxics. 12(1)
[Journal article]Authored by: Jeyakumar, P.
Palihakkara, J., Burkitt, L., Jeyakumar, P., & Attanayake, CP. (2024). Exploring Phosphorus Dynamics in Submerged Soils and Its Implications on the Inconsistent Rice Yield Response to Added Inorganic Phosphorus Fertilisers in Paddy Soils in Sri Lanka. Journal of Soil Science and Plant Nutrition. 24(1), 1-20
[Journal article]Authored by: Burkitt, L., Jeyakumar, P.
Matse, DT., Avendano, F., Bishop, P., Jeyakumar, P., & Bates, G. (2023). Simulating Gibberellic Acid Effect on Pasture Yield on Naturally Deposited and Fixed Area Urine. Environments - MDPI. 10(7)
[Journal article]Authored by: Jeyakumar, P.
Sun, H., Chen, S., Zhu, N., Jeyakumar, P., Wang, J., Xie, W., . . . Feng, Y. (2023). Hydrothermal carbonization aqueous phase promotes nutrient retention and humic substance formation during aerobic composting of chicken manure. Bioresource Technology. 385
[Journal article]Authored by: Jeyakumar, P.
Wei, J., Wang, X., Tu, C., Long, T., Bu, Y., Wang, H., . . . Deng, S. (2023). Remediation technologies for neonicotinoids in contaminated environments: Current state and future prospects. Environment International. 178
[Journal article]Authored by: Jeyakumar, P.
Yi, Z., Jeyakumar, P., Yin, C., & Sun, H. (2023). Effects of biochar in combination with varied N inputs on grain yield, N uptake, NH<inf>3</inf> volatilization, and N<inf>2</inf>O emission in paddy soil. Frontiers in Microbiology. 14
[Journal article]Authored by: Jeyakumar, P.
Rodriguez-Gomez, C., Kereszturi, G., Jeyakumar, P., Pullanagari, R., Reeves, R., Rae, A., . . . Procter, JN. (2023). Remote exploration and monitoring of geothermal sources: A novel method for foliar element mapping using hyperspectral (VNIR-SWIR) remote sensing. Geothermics. 111
[Journal article]Authored by: Jeyakumar, P., Kereszturi, G., Procter, J.
Abhiram, G., McCurdy, M., Davies, CE., Grafton, M., Jeyakumar, P., & Bishop, P. (2023). An innovative lysimeter system for controlled climate studies. Biosystems Engineering. 228, 105-119
[Journal article]Authored by: Grafton, M., Jeyakumar, P.
Matse, DT., Jeyakumar, P., Bishop, P., & Anderson, CWN. (2023). Nitrification rate in dairy cattle urine patches can be inhibited by changing soil bioavailable Cu concentration. Environmental Pollution. 320
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Gu, S., Yang, X., Chen, H., Jeyakumar, P., Chen, J., & Wang, H. (2023). Crawfish shell- and Chinese banyan branch-derived biochars reduced phytoavailability of As and Pb and altered community composition of bacteria in a contaminated arable soil. Science of the Total Environment. 865
[Journal article]Authored by: Jeyakumar, P.
Wei, B., Peng, Y., Jeyakumar, P., Lin, L., Zhang, D., Yang, M., . . . Li, C. (2023). Soil pH restricts the ability of biochar to passivate cadmium: A meta-analysis. Environmental Research. 219
[Journal article]Authored by: Jeyakumar, P.
Wei, J., Tu, C., Xia, F., Yang, L., Chen, Q., Chen, Y., . . . Bhatnagar, A. (2023). Enhanced removal of arsenic and cadmium from contaminated soils using a soluble humic substance coupled with chemical reductant. Environmental Research. 220
[Journal article]Authored by: Jeyakumar, P.
Abhiram, G., Grafton, M., Jeyakumar, P., Bishop, P., Davies, CE., & McCurdy, M. (2023). Iron-rich sand promoted nitrate reduction in a study for testing of lignite based new slow-release fertilisers. Science of the Total Environment. 864
[Journal article]Authored by: Grafton, M., Jeyakumar, P.
Matse, DT., Jeyakumar, P., Bishop, P., & Anderson, CWN. (2023). Copper induces nitrification by ammonia-oxidizing bacteria and archaea in pastoral soils. Journal of Environmental Quality. 52(1), 49-63
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Abhiram, G., Bishop, P., Jeyakumar, P., Grafton, M., Davies, CE., & McCurdy, M. (2023). Formulation and characterization of polyester-lignite composite coated slow-release fertilizers. Journal of Coatings Technology and Research. 20(1), 307-320
[Journal article]Authored by: Grafton, M., Jeyakumar, P.Contributed to by: Grafton, M.
Peng, Y., Hanly, JA., Jeyakumar, P., & Calvelo-Pereira, R. (2023). Effects of full inversion tillage during pasture renewal on soil and plant cadmium concentrations: a case study in New Zealand. Soil Research. 61(4), 410-420
[Journal article]Authored by: Hanly, J., Jeyakumar, P.
Abhiram, G., Grafton, M., Jeyakumar, P., Bishop, P., Davies, CE., & McCurdy, M. (2022). The Nitrogen Dynamics of Newly Developed Lignite-Based Controlled-Release Fertilisers in the Soil-Plant Cycle. Plants. 11(23)
[Journal article]Authored by: Grafton, M., Jeyakumar, P.Contributed to by: Grafton, M.
Matse, DT., Jeyakumar, P., Bishop, P., & Anderson, CWN. (2022). Nitrate Leaching Mitigation Options in Two Dairy Pastoral Soils and Climatic Conditions in New Zealand. Plants. 11(18)
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Sun, H., Yi, Z., Jeyakumar, P., Xia, C., Feng, Y., Lam, SS., . . . Shi, W. (2022). Citric acid modified biochar application at a low dosage can synchronically mitigate the nitrogenous gas pollutants emission from rice paddy soils. Environmental Pollution. 312
[Journal article]Authored by: Jeyakumar, P.
Qiao, Y., Hou, H., Chen, L., Wang, H., Jeyakumar, P., Lu, Y., . . . Han, D. (2022). Comparison of Pb and Cd in wheat grains under air-soil-wheat system near lead-zinc smelters and total suspended particulate introduced modeling attempt. Science of the Total Environment. 839
[Journal article]Authored by: Jeyakumar, P.
Chen, S., Feng, Y., Han, L., Li, D., Feng, Y., Jeyakumar, P., . . . Wang, H. (2022). Responses of rice (Oryza sativa L.) plant growth, grain yield and quality, and soil properties to the microplastic occurrence in paddy soil. Journal of Soils and Sediments. 22(8), 2174-2183
[Journal article]Authored by: Jeyakumar, P.
Zhang, Y., Jeyakumar, P., Xia, C., Lam, SS., Jiang, J., Sun, H., . . . Shi, W. (2022). Being applied at rice or wheat season impacts biochar's effect on gaseous nitrogen pollutants from the wheat growth cycle. Environmental Pollution. 306
[Journal article]Authored by: Jeyakumar, P.
Gao, Y., Wu, P., Jeyakumar, P., Bolan, N., Wang, H., Gao, B., . . . Wang, B. (2022). Biochar as a potential strategy for remediation of contaminated mining soils: Mechanisms, applications, and future perspectives. Journal of Environmental Management. 313
[Journal article]Authored by: Jeyakumar, P.
Anderson, CWN., Smith, SL., Jeyakumar, P., Thompson-Morrison, H., & Cavanagh, JAE. (2022). Forage crops and cadmium: How changing farming systems might impact cadmium accumulation in animals. Science of the Total Environment. 827
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Yi, Z., Jeyakumar, P., Jiang, J., Zhang, X., Yue, C., & Sun, H. (2022). Effect of Reaction-Finished Solution of Hydrochar (HRFS) Application on Rice Grain Yield and Nitrogen Use Efficiency in Saline Soil. Phyton-International Journal of Experimental Botany. 91(4), 859-868
[Journal article]Authored by: Jeyakumar, P.
Houssou, AA., Jeyakumar, P., Niazi, NK., Van Zwieten, L., Li, X., Huang, L., . . . Huang, Z. (2022). Biochar and soil properties limit the phytoavailability of lead and cadmium by Brassica chinensis L. in contaminated soils. Biochar. 4(1)
[Journal article]Authored by: Jeyakumar, P.
Ustiatik, R., Nuraini, Y., Suharjono, S., Jeyakumar, P., Anderson, CWN., & Handayanto, E. (2022). Endophytic bacteria promote biomass production and mercury-bioaccumulation of Bermuda grass and Indian goosegrass. International Journal of Phytoremediation. 24(11), 1184-1192
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Shrestha, G., Calvelo-Pereira, R., Roudier, P., Martin, AP., Turnbull, RE., Kereszturi, G., . . . Anderson, CWN. (2022). Quantification of multiple soil trace elements by combining portable X-ray fluorescence and reflectance spectroscopy. Geoderma. 409
[Journal article]Authored by: Anderson, C., Jeyakumar, P., Kereszturi, G.
Matse, DT., Jeyakumar, P., Bishop, P., & Anderson, CWN. (2022). Bioavailable Cu can influence nitrification rate in New Zealand dairy farm soils. Journal of Soils and Sediments. 22(3), 916-930
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Yang, S., Wu, P., Jeyakumar, P., Wang, H., Zheng, X., Liu, W., . . . Ru, S. (2022). Technical solutions for minimizing wheat grain cadmium: A field study in North China. Science of the Total Environment. 818
[Journal article]Authored by: Jeyakumar, P.
Sun, H., Jeyakumar, P., Xiao, H., Li, X., Liu, J., Yu, M., . . . Shi, W. (2022). Biochar can increase Chinese cabbage (Brassica oleracea L.) yield, decrease nitrogen and phosphorus leaching losses in intensive vegetable soil. Phyton-International Journal of Experimental Botany. 91(1), 197-206
[Journal article]Authored by: Jeyakumar, P.
Ustiatik, R., Nuraini, Y., Suharjono, S., Jeyakumar, P., Anderson, CWN., & Handayanto, E. (2022). Mercury resistance and plant growth promoting traits of endophytic bacteria isolated from mercury-contaminated soil. Bioremediation Journal. 26(3), 208-227
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Bishop, P., & Jeyakumar, P. (2022). A comparison of three nitrate leaching mitigation treatments with dicyandiamide using lysimeters. New Zealand Journal of Agricultural Research. 65(6), 547-560
[Journal article]Authored by: Jeyakumar, P.
Rodriguez-Gomez, C., Kereszturi, G., Reeves, R., Rae, A., Pullanagari, R., Jeyakumar, P., . . . Procter, J. (2021). Lithological mapping of Waiotapu Geothermal Field (New Zealand) using hyperspectral and thermal remote sensing and ground exploration techniques. Geothermics. 96
[Journal article]Authored by: Jeyakumar, P., Kereszturi, G., Procter, J.
Song, A., Li, Z., Wang, E., Xu, D., Wang, S., Bi, J., . . . Fan, F. (2021). Supplying silicon alters microbial community and reduces soil cadmium bioavailability to promote health wheat growth and yield. Science of the Total Environment. 796
[Journal article]Authored by: Jeyakumar, P.
Wu, P., Wang, Z., Bhatnagar, A., Jeyakumar, P., Wang, H., Wang, Y., . . . Li, X. (2021). Microorganisms-carbonaceous materials immobilized complexes: Synthesis, adaptability and environmental applications. Journal of Hazardous Materials. 416
[Journal article]Authored by: Jeyakumar, P.
Sun, H., Zhang, Y., Yang, Y., Chen, Y., Jeyakumar, P., Shao, Q., . . . Wang, H. (2021). Effect of biofertilizer and wheat straw biochar application on nitrous oxide emission and ammonia volatilization from paddy soil. Environmental Pollution. 275
[Journal article]Authored by: Jeyakumar, P.
Ubeynarayana, N., Jeyakumar, P., Bishop, P., Pereira, RC., & Anderson, CWN. (2021). Effect of soil cadmium on root organic acid secretion by forage crops. Environmental Pollution. 268
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Albert, HA., Li, X., Jeyakumar, P., Wei, L., Huang, L., Huang, Q., . . . Wang, H. (2021). Influence of biochar and soil properties on soil and plant tissue concentrations of Cd and Pb: A meta-analysis. Science of the Total Environment. 755
[Journal article]Authored by: Jeyakumar, P.
Yang, T., Meng, J., Jeyakumar, P., Cao, T., Liu, Z., He, T., . . . Wang, H. (2021). Effect of pyrolysis temperature on the bioavailability of heavy metals in rice straw-derived biochar. Environmental Science and Pollution Research. 28(2), 2198-2208
[Journal article]Authored by: Jeyakumar, P.
Geretharan, T., Jeyakumar, P., Bretherton, M., & Anderson, CWN. (2020). Fluorine and white clover: Assessing fluorine's impact on Rhizobium leguminosarum. Journal of Environmental Quality. 49(4), 987-999
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
He, WY., Liao, W., Yang, JY., Jeyakumar, P., & Anderson, C. (2020). Removal of vanadium from aquatic environment using phosphoric acid modified rice straw. Bioremediation Journal. 24(1), 80-89
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Xia, S., Song, Z., Jeyakumar, P., Bolan, N., & Wang, H. (2020). Characteristics and applications of biochar for remediating Cr(VI)-contaminated soils and wastewater. Environmental Geochemistry and Health. 42(6), 1543-1567
[Journal article]Authored by: Jeyakumar, P.
Mao, Q., Zhou, Y., Yang, Y., Zhang, J., Liang, L., Wang, H., . . . Rizwan, M. (2019). Experimental and theoretical aspects of biochar-supported nanoscale zero-valent iron activating H<inf>2</inf>O<inf>2</inf> for ciprofloxacin removal from aqueous solution. Journal of Hazardous Materials. 380
[Journal article]Authored by: Jeyakumar, P.
Xia, S., Song, Z., Jeyakumar, P., Shaheen, SM., Rinklebe, J., Ok, YS., . . . Wang, H. (2019). A critical review on bioremediation technologies for Cr(VI)-contaminated soils and wastewater. Critical Reviews in Environmental Science and Technology. 49(12), 1027-1078
[Journal article]Authored by: Jeyakumar, P.
Hermansen, C., Moldrup, P., Müller, K., Jensen, PW., van den Dijssel, C., Jeyakumar, P., . . . de Jonge, LW. (2019). Organic carbon content controls the severity of water repellency and the critical moisture level across New Zealand pasture soils. Geoderma. 338, 281-290
[Journal article]Authored by: Jeyakumar, P.
Geretharan, T., Jeyakumar, P., Bretherton, M., & Anderson, CWN. (2018). Defining a standard method to measure the total and bioavailable concentration of fluorine in New Zealand soils. Microchemical Journal. 142, 94-101
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Wang, M., Tang, Y., Anderson, CWN., Jeyakumar, P., & Yang, JY. (2018). Correction to: Effect of simulated acid rain on fluorine mobility and the bacterial community of phosphogypsum (Environmental Science and Pollution Research, (2018), 25, 16, (15336-15348), 10.1007/s11356-018-1408-5). Environmental Science and Pollution Research. 25(23), 23371-23372
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Wang, M., Tang, Y., Anderson, CWN., Jeyakumar, P., & Yang, J. (2018). Effect of simulated acid rain on fluorine mobility and the bacterial community of phosphogypsum. Environmental Science and Pollution Research. 25(16), 15336-15348
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Stafford, AD., Kusumo, BH., Jeyakumar, P., Hedley, MJ., & Anderson, CWN. (2018). Cadmium in soils under pasture predicted by soil spectral reflectance on two dairy farms in New Zealand. Geoderma Regional. 13, 26-34
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Stafford, A., Jeyakumar, P., Hedley, M., & Anderson, C. (2018). Influence of soil moisture status on soil cadmium phytoavailability and accumulation in plantain (Plantago lanceolata). Soil Systems. 2(1), 1-15
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Bretherton, M., Horne, D., Sumanasena, HA., Jeyakumar, P., & Scotter, D. (2018). Repellency-induced runoff from New Zealand hill country under pasture: A plot study. Agricultural Water Management. 201, 83-90
[Journal article]Authored by: Horne, D., Jeyakumar, P.
Stafford, AD., Palmer, AS., Jeyakumar, P., Hedley, MJ., & Anderson, CWN. (2018). Soil cadmium and New Zealand dairy farms: Impact of whole-farm contaminant variability on environmental management. Agriculture, Ecosystems and Environment. 254, 282-291
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Black, M., Miller, S., Dean, F., Carder, D., Jeyakumar, P., & Anderson, CWN. (2014). Getting to grips with copper chemistry. New Zealand Kiwifruit Journal. November/December 2014(228), 23-25
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Müller, K., Deurer, M., Jeyakumar, P., Mason, K., van den Dijssel, C., Green, S., . . . Clothier, B. (2014). Temporal dynamics of soil water repellency and its impact on pasture productivity. Agricultural Water Management. 143, 82-92
[Journal article]Authored by: Jeyakumar, P.
Jeyakumar, P., Müller, K., Deurer, M., Van den Dijssel, C., Mason, K., Le Mire, G., . . . Clothier, B. (2014). A novel approach to quantify the impact of soil water repellency on run-off and solute loss. Geoderma. 221-222, 121-130
[Journal article]Authored by: Jeyakumar, P.
Jeyakumar, P., Müller, K., Deurer, M., van den Dijssel, C., Mason, K., Le Mire, G., . . . Clothier, B. (2014). A novel approach to quantify the impact of soil water repellency on run-off and solute loss. Geoderma.
[Journal article]Authored by: Jeyakumar, P.
Jeyakumar, P., Loganathan, P., Anderson, CWN., Sivakumaran, S., & McLaren, RG. (2014). Comparative tolerance of Pinus radiata and microbial activity to copper and zinc in a soil treated with metal-amended biosolids. Environmental Science and Pollution Research. 21(5), 3254-3263
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Villholth, KG., Jeyakumar, P., Amerasinghe, PH., Manamperi, ASP., Vithanage, M., Goswami, RR., . . . Panabokke, CR. (2010). Tsunami impacts and rehabilitation of groundwater supply: Lessons learned from eastern Sri Lanka. , 82-99
[Journal article]Authored by: Jeyakumar, P.
Jeyakumar, P., Loganathan, P., Sivakumaran, S., Anderson, CWN., & McLaren, RG. (2010). Bioavailability of copper and zinc to poplar and microorganisms in a biosolids-amended soil. Australian Journal of Soil Research. 48(5), 459-469
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Jeyakumar, P., Loganathan, P., Sivakumaran, S., Anderson, CWN., & McLaren, RG. (2008). Copper and zinc spiking of biosolids: Effect of incubation period on metal fractionation and speciation and microbial activity. Environmental Chemistry. 5(5), 347-354
[Journal article]Authored by: Anderson, C., Jeyakumar, P.
Jeyakumar, P., Pathmarajah, S., & Ariyaratne, AR. (2001). User–friendly computer package for on–farm water management in the dry zone of Sri Lanka. Journal of Tropical Agricultural Research. 13, 112-122
[Journal article]Authored by: Jeyakumar, P.

Book

Villholth, KG., Jeyakumar, P., Amerasinghe, PH., Manamperi, ASP., Vithanage, M., Goswami RR, RR., . . . Panabokke, CR. (2010). Tsunami impacts and rehabilitation of groundwater supply: Lessons learned from Eastern Sri Lanka. In MK. Jha (Ed.) Natural and Anthropogenic Disasters: Vulnerability, Preparedness and Mitigation. (pp. 82 - 99). New York: Springer
[Chapter]Authored by: Jeyakumar, P.
Villholth, KG., Amerasinghe, P., & Jeyakumar, P. (2008). Tsunami impacts on shallow groundwater and associated water supplies on the East Coast of Sri Lanka. In Groundwater for Sustainable Development: Problems, Perspectives and Challenges. (pp. 211 - 222).
[Chapter]Authored by: Jeyakumar, P.

Report

Villholth, KG., Amerasinghe, PH., Jeyakumar, P., Panabokke, CR., Woolley, O., Weerasinghe, MD., . . . Pathirana, SRK.(2005). Tsunami impacts on shallow groundwater and associated water supply on the east coast of Sri Lanka. Colombo, Sri Lanka: International Water Management Institute (IWMI)
[Technical Report]Authored by: Jeyakumar, P.

Conference

Raveendrakumaran, B., Grafton, MC., Jeyakumar, P., Bishop, P., & Davies, CE.Characterization traffic induced compaction in controlled traffic farming (CTF) and random traffic farming (RTF) - A multivariate approach. . Palmerston North
[Conference Paper]Authored by: Grafton, M., Jeyakumar, P.Contributed to by: Grafton, M.
Rodriguez-Gomez, C., Kereszturi, G., Reeves, R., Mead, S., Pullanagari, R., Rae, A., . . . Jeyakumar, P.Mapping Antimony Concentration over Geothermal Areas Using Hyperspectral and Thermal Remote Sensing. International Geoscience and Remote Sensing Symposium (IGARSS). (pp. 1086 - 1089).
[Conference]Authored by: Jeyakumar, P., Kereszturi, G., Mead, S.
Raveendrakumaran, B., Grafton, M., Jeyakumar, P., Bishop, P., & Davies, C.COMPARATIVE EVALUATION OF CONTROLLED RELEASE FERTILISERS FOR NITRATE LEACHING. . Massey University
[Conference Paper]Authored by: Grafton, M., Jeyakumar, P.Contributed to by: Grafton, M.Edited by: Christensen, C.
Gunaratnam, A., Grafton, M., Jeyakumar, P., Bishop, P., Davies, C., & McCurdy, M.(2020). STUDY THE INFLUENCE OF SOIL MOISTURE AND PACKING INCREMENTAL LEVEL ON SOIL PHYSICAL AND HYDRAULIC PROPERTIES. . Massey University
[Conference Paper]Authored by: Grafton, M., Jeyakumar, P.Contributed to by: Grafton, M.Edited by: Christensen, C.
Jeyakumar, P., Geretharan, T., Anderson, C., & Bretherton, M. (2019, May). Does soil fluorine risk soil health and pasture productivity in New Zealand agricultural system?. Presented at 15th International Conference on the Biogeochemistry of Trace Elements (ICOBTE). Nanjing, China.
[Conference Oral Presentation]Authored by: Anderson, C., Jeyakumar, P.
Ubeynarayana, N., Jeyakumar, P., Bishop, P., Calvelo Pereira, R., & Anderson, C. (2019, May). Development of an innovative Cd 2+ ion specific electrode to explore Cd rhizosphere process. Presented at 15th International conference on the biogeochemistry of trace elements. Nanjing, China.
[Conference Oral Presentation]Authored by: Anderson, C., Jeyakumar, P.
Ubeynarayana, N., Jeyakumar, P., Bishop, P., Calvelo Pereira, R., & Anderson, C. (2019, February). Influence of soil Cd levels on root exudate secretion in chicory and plantain. Presented at 32ndAnnual FLRC Workshop. Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Anderson, C., Jeyakumar, P.
McCurdy, M., Davies, C., Gunaratnam, A., Grafton, M., Bishop, P., & Jeyakumar, P.Instrumentation of a bank of lysimeters: Sensors and sensibility. Paper presented at the meeting of icheme. Sydney, Australia
[Conference Paper]Authored by: Grafton, M., Jeyakumar, P.Contributed to by: Grafton, M.
McCurdy, M., Davies, C., Gunaratnam, A., Grafton, M., Bishop, P., & Jeyakumar, P. (2019). Instrumentation of a bank of lysimeters: Sensors and sensibilty. In F. Geoghegan (Ed.) icheme. : Chemeca 2019
[Conference Paper in Published Proceedings]Authored by: Grafton, M., Jeyakumar, P.Contributed to by: Grafton, M.
Gnaratnam, A., McCurdy, M., Grafton, M., Jeyakumar, P., Bishop, P., & Davies, C.(2019). ASSESSMENT OF NITROGEN FERTILIZERS UNDER CONTROLLED ENVIRONMENT – A LYSIMETER DESIGN. Paper presented at the meeting of Occasional Report No. 32. Fertilizer and Lime Research Centre. Massey University, Palmerston North
[Conference Paper]Authored by: Grafton, M., Jeyakumar, P.Contributed to by: Grafton, M.Edited by: Christensen, C.
Ubeynarayana, N., Jeyakumar, P., Anderson, C., Calvelo Pereira, R., & Bishop, P. (2018, December). Innovative cadmium (Cd) electrode to quantify soil and plant Cd species. Presented at NZ Society of Soil Science Conference. Napier, New Zealand.
[Conference Oral Presentation]Authored by: Anderson, C., Jeyakumar, P.
Ubeynarayana, N., Jeyakumar, P., Calvelo Pereira, R., Bishop, P., & Anderson, CA. (2018). DETERMINATION OF THE CADMIUM UPTAKE MECHANISM IN FORAGE SPECIES IN NEW ZEALAND LIVESTOCK GRAZING SYSTEMS. Poster session presented at the meeting of 31st Annual FLRC Workshop. Palmerston North, New Zealand
[Conference Poster]Authored by: Anderson, C., Jeyakumar, P.
Jeyakumar, P., Stafford, AD., Anderson, C., Cavanagh, JE., & Smith, S. (2017, July). Cadmium risks to soil, crop and livestock productivity in New Zealand agricultural system and strategies for mitigation. Presented at The International Conference on the Biogeochemistry of Trace Elements (ICOBTE 2017). Zurich, Switzerland.
[Conference Oral Presentation]Authored by: Anderson, C., Jeyakumar, P.
Hedley, MJ., Stafford, A., Anderson, CWA., Jeyakumar, P., Kusumo, B., Mitchell, C., . . . Calvelo-Pereira, R. (2017). Mitigating elevated topsoil cadmium with topsoil inversion tillage. In LD. Currie, & MJ. Hedley (Eds.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 88 - 88). : 30th Annual Fertilizer Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.
Cavanagh, JE., Yi, M., Lehto, N., Robinson, B., Geretharan, T., Jeyakumar, P., . . . Anderson, CWA. (2017). Understanding the influence of soil properties on plant uptake of cadmium in New Zealand agricultural soils. In . L. D. Currie and M. J. Hedley (Ed.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 1 - 11). : 30th Annual Fertilizer & Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.
Thompson-Morrison, H., Anderson, CWN., Jeyakumar, P., Geretharan, T., Cavanagh, J., & Robinson, B. (2017). Cost-benefit analysis of cadmium management in New Zealand’s horticultural soils. In LD. Currie, & MJ. Hedley (Eds.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 1 - 4). : 30th Annual Fertilizer Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.
Geretharan, T., Jeyakumar, P., Anderson, CWA., & Bretherton, M. (2017). Effects of soil properties on bioavailability of fluorine to microorganisms. In LD. Currie, & MJ. Hedley (Eds.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 89 - 89). Palmerston North, New Zealand: 30th Annual Fertilizer Lime Research Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.
Stafford, A., Jeyakumar, P., Anderson, CWA., & Hedley, MJ. (2017). Influence of fluctuating soil moisture on cadmium phytoavailability and accumulation in plantain. In . L. D. Currie and M. J. Hedley (Ed.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 81 - 81). : 30th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.
Alborno Jover, PMY., Anderson, CWA., & Jeyakumar, P. (2016). Environmental management perspectives of soil fluorine in New Zealand’s agricultural soils. , Joint Soils Conference of the New Zealand and Australian Societies of Soil Science
[Conference Abstract]Authored by: Anderson, C., Jeyakumar, P.
Thompson-Morrison, H., Anderson, CWA., Jeyakumar, P., Cavanagh, J., & Robinson, B. (2016). An economic perspective on soil amendment use for regulating cadmium bioavailability in horticultural soil. , Joint Soils Conference of the New Zealand and Australian Societies of Soil Science
[Conference Abstract]Authored by: Anderson, C., Jeyakumar, P.
Geretharan, T., Jeyakumar, P., Anderson, CWN., & Bretherton, M. (2016). Effect of lime and compost on fluorine bioavailability and microorganisms in New Zealand horticultural soils. , Joint Soils conference of the New Zealand and Australian Societies of Soil Science
[Conference Abstract]Authored by: Anderson, C., Jeyakumar, P.
Okafor, CM., Jeyakumar, P., & Anderson, CWA. (2016). Does land application of drilling waste pose a threat to New Zealand agricultural systems?. Integrated Nutrient and Water Management for Sustainable Farming. (pp. 1 - 7). : 29th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.
Jeyakumar, P., & Anderson, CWN. (2016). Recent methodology developments in soil fluorine analysis. In LD. Currie, & R. Singh (Eds.) Integrated Nutrient and Water Management for Sustainable Farming. (pp. 53 - 53). Palmerston North, New Zealand: 29th Annual Fertilizer Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.
Cavanagh, J., Munir, K., Gray, C., Wakelin, S., Chioma, O., Jeyakumar, P., . . . Robinson, B. (2016). Assessing the significance of cadmium in New Zealand agricultural systems – Preliminary results. In . L. D. Currie and R. Singh (Ed.) Integrated Nutrient and Water Management for Sustainable Farming. (pp. 51 - 51). : 29th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.
Hageman, LF., Jeyakumar, P., Smith, S., & Anderson, CWA. (2015). Serum and faecal zinc concentrations in sheep following low dose oral ZnO treatment. In LD. Currie, & LL. Burkitt (Eds.) Moving Farm Systems to Improved Attenuation. (pp. 81 - 81). : 28th Annual Fertilizer Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.Edited by: Burkitt, L.
Jeyakumar, P., Anderson, CWN., & Cronin, SJ. (2014). Comparison of trace elements in potatoes grown in volcanic soil versus non-volcanic soil. , New Zealand Society of Soil Science - Soil Science for future generations 2014 Conference
[Conference Abstract]Authored by: Anderson, C., Jeyakumar, P.
Jeyakumar, P., Anderson, CWN., Miller, S., & Holmes, A. (2014). Optimising copper sprays on kiwifruit: A review. In LD. Lance, & CL. Christensen (Eds.) FLRC Workshop Proceedings. Palmerston North: 27th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Jeyakumar, P.
Clothier, BE., Müller, K., Deurer, M., Green, S., Jeyakumar, P., van den Dijssel, C., . . . Herath, I. (2013, November). The natural capital value of soil: Carbon, macropores and hydrophobicity. Presented at American Society of Agronomy/ Crop Science Society of America / Soil Science Society of America International Annual Meetings. Tampa, United States of America.
[Conference Oral Presentation]Authored by: Jeyakumar, P.
Jeyakumar, P., Müller, K., Deurer, M., van den Dijssel, C., Mason, K., Green, S., . . . Clothier, BE. (2012, April). Influence of soil water repellency on runoff and solute loss from New Zealand pasture. Presented at European Geosciences Union General Assembly 2012. Vienna, Austria.
[Conference Oral Presentation]Authored by: Jeyakumar, P.
Jeyakumar, P., Loganathan, P., Anderson, CWN., Sivakumaran, S., & McLaren, RG. (2010). Response of Pinus radiata and soil microbial activity to increasing copper and zinc contamination in a soil treated with metal–amended biosolids. In RJ. Gilkes, & N. Prakongkep (Eds.)Brisbane, Australia: 19th World Congress of Soil Science: Soil Solutions for a Changing World
[Conference Paper in Published Proceedings]Authored by: Jeyakumar, P.
Jeyakumar, P., Loganathan, P., Sivakumaran, S., Anderson, CWN., & McLaren, RG. (2009, July). Comparative tolerance of poplar and microorganisms to copper and zinc toxicity in a biosolids–amended soil. Presented at 10th International Conference on the Biogeochemistry of Trace Elements. Chihuahua, Mexico.
[Conference Oral Presentation]Authored by: Jeyakumar, P.

Other

Villholth, KG., Jeyakumar, P., Amerasinghe, PH., Manamperi, ASP., Vithanage, M., Goswami, RR., . . . Panabokke, CR. (2010). Tsunami impacts and rehabilitation of groundwater supply: Lessons learned from Eastern Sri Lanka. (pp. 296 - 308). In Paris: UNESCO: International Hydrological Program Publication
[Working Paper]Authored by: Jeyakumar, P.

Teaching and Supervision

Summary of Doctoral Supervision

Position Current Completed
Main Supervisor 3 2
Co-supervisor 6 6

Current Doctoral Supervision

Main Supervisor of:

  • Upulika Jayaneththi - Doctor of Philosophy
    Understanding the microbial functional diversity of regenerative pastoral systems
  • Rukshagini Sutharsan - Doctor of Philosophy
    Nitrogen cycling and uptake under diverse pastures and regenerative management
  • Kaloni Alu - Doctor of Philosophy
    Trace elements under forage crops and diverse pasture swards

Co-supervisor of:

  • Jalal Moradisahra - Doctor of Philosophy
    Phosphorus cycling and uptake under diverse pastures and regenerative management
  • Dishan Amarasinghage - Doctor of Philosophy
    Exploring the benefits of shelterbelts in New Zealand pastures to enhance soil microbial functions
  • Madusha Dissanayake Mudiyanselage - Doctor of Philosophy
    Understanding the effects of elevated soil phosphorus on soil health and avocado fruit quality
  • Janani Palihakkara - Doctor of Philosophy
    Phosphorus speciation in submerged agricultural soils
  • Iro Sefa - Doctor of Philosophy
    Assessing the Nutrient Status of Cocoa (Theobromae cacao) in Solomon Islands
  • Fredy Monserrate Rojas - Doctor of Philosophy
    Fertiliser management strategies for improving fruit nutrient composition and quality in Hass avocado

Completed Doctoral Supervision

Main Supervisor of:

  • 2023 - Dumsane Matse - Doctor of Philosophy
    MANIPULATING SOIL BIOAVAILABLE COPPER AS AN INNOVATIVE NITRATE LEACHING MITIGATING STRATEGY IN NEW ZEALAND PASTORAL SOILS
  • 2021 - Nilusha Ubeynarayana - Doctor of Philosophy
    Plant associated soil mechanisms of Cd uptake and translocation in chicory and plantain

Co-supervisor of:

  • 2023 - Gautam Shrestha - Doctor of Philosophy
    Amplifying the power of proximal sensing to assess the cadmium concentration in agricultural soils
  • 2023 - Cecilia Rodriguez Gomez - Doctor of Philosophy
    Geothermal exploration using hyperspectral and thermal remote sensing – Inferring shallow hydrology of the Waiotapu Geothermal Field, New Zealand
  • 2022 - Bawatharani Raveendrakumaran - Doctor of Philosophy
    Controlled release fertilisers and controlled traffic farming in mitigating nitrogen losses
  • 2021 - Abhiram Gunaratnam - Doctor of Philosophy
    Design and fabrication of a climate-controlled lysimeter and testing of new controlled-release fertilisers
  • 2019 - Geretharan Thangavelautham - Doctor of Philosophy
    Impact of phosphate fertiliser derived fluorine on soil microbiology and white clover (Trifolium repens L)
  • 2017 - Aaron Stafford - Doctor of Philosophy
    Distribution of cadmium in long-term dairy soils, its accumulation in selected plant species, and the implications for management and mitigation