Ryan Orr is a chemist and soil scientist with experience in the commercial laboratory and university sector. Currently his research is focused on minimizing the impacts of Panama disease in North Queensland by managing soil abiotic characteristics. In particular this research is investigating the use of fertilisers for micronutrient control.

After completing a BSc. in Chemistry with the University of Victoria in Canada, Ryan undertook an MSc. at James Cook University in Environmental Earth Science. His research focused on the prediction of soil organic carbon content in Papua New Guinean soils using infrared spectroscopy. He, supervised by Associate Professor Paul Nelson, is currently part of a multiorganisational attempt to combat Panama disease in the Australian banana growing industry.

Research Disciplines

• Soil sciences (4106)
• Horticultural production (3008)
• Plant biology (3108)

Socio-Economic Objectives

• Horticultural crops (2605)

These are the most recent publications associated with this author. To see a detailed profile of all publications stored at JCU, visit ResearchOnline@JCU. Hover over Altmetrics badges to see social impact.

Journal Articles

• Orr R, Dennis P, Wong Y, Browne D, Cooper M, Birt H, Lapis-Gaza H, Pattison A and Nelson P (2022) Nitrogen fertilizer rate but not form affects the severity of Fusarium wilt in banana. Frontiers in Plant Science, 13.
• Orr R and Nelson P (2021) Eucalyptus cloeziana mulch suppresses Fusarium wilt of banana. Crop Protection, 147.
• Orr R, Pattison A, Northfield T and Nelson P (2021) Iron chelates have little to no effect on the severity of Fusarium wilt of bananas in soils of the humid tropics. Journal of Plant Pathology, 103. pp. 595-604
• Oliver D, Li Y, Orr R, Nelson P, Barnes M, McLaughlin M and Kookana R (2020) Sorption behaviour of per- and polyfluoroalkyl substances (PFASs) in tropical soils. Environmental Pollution, 258.
• Orr R, Hocking R, Pattison A and Nelson P (2020) Extraction of metals from mildly acidic tropical soils: interactions between chelating ligand, pH and soil type. Chemosphere, 248.
• Bowen A, Orr R, McBeath A, Pattison A and Nelson P (2019) Suppressiveness or conduciveness to Fusarium wilt of bananas differs between key Australian soils. Soil Research, 57 (2). pp. 158-165
• Oliver D, Li Y, Orr R, Nelson P, Barnes M, McLaughlin M and Kookana R (2019) The role of surface charge and pH changes in tropical soils on sorption behaviour of per- and polyfluoroalkyl substances (PFASs). Science of the Total Environment, 673. pp. 197-206
• Orr R, Pattison A, East D, Warman N, O'Neill W, Czislowski E and Nelson P (2019) Image-based quantification of Fusarium wilt severity in banana. Australasian Plant Disease Notes, 14.
• Orr R and Nelson P (2018) Impacts of soil abiotic attributes on Fusarium wilt, focusing on bananas. Applied Soil Ecology, 132. pp. 20-33
• Orr R, McBeath A, Dieleman W, Bird M and Nelson P (2017) Estimating organic carbon content of soil in Papua New Guinea using infrared spectroscopy. Soil Research, 55 (8). pp. 735-742

Other research outputs

• Orr R and Nelson P (2019) How soil management can help in the battle against Panama disease and other Fusarium wilts. Science Trends LLC,
• Dennis P, Birt H, Raghavendra A, Waugh G, Wang H, Aitken E, Gervacio T, Orr R, Nelson P, Daniells J and Pattison T (2018) Identification of disease suppressive banana plant and soil microbiomes. Phytopathology, 108 (10). p. S1.265

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ResearchOnline@JCU stores 13+ research outputs authored by Mr Ryan Orr from 2017 onwards.

Current and recent Research Funding to JCU is shown by funding source and project.

The map shows research collaborations by institution from the past 7 years.
Note: Map points are indicative of the countries or states that institutions are associated with.