SIMPSON, Jacquelyn

Jacquelyn Simpson

Research expertise

  • Optimising the productivity of perennial tree crops
  • Temperate nut research
  • Regional suitability for nut industry expansion
  • Management of orchards planted in non-traditional production regions or climates
  • Managing tree canopies for productive and sustainable orchards
  • Nutrient and water requirements and improving the availability of nutrients in soils
  • The impact of the environment on pollination (pollen and flower viability)


Jacquelyn is a tree physiologist, who completed her PhD at the University of Sydney on nitrogen cycling of forestry plantations before joining the department in 2015.

As a research horticulturist specialising in temperate nuts, Jacquelyn is interested in understanding the most sustainable and profitable orchard management practices to help maximise production and to encourage industry expansion. This includes orchard management in traditional and non-traditional climatic growing regions, plant nutrition and ecophysiology, pollination and tree architecture management in temperate nut crops (Almond, Chestnut, Hazelnut, Pecan, Pistachio and Walnut).


  • Bachelor of Science (Plant Science and Biochemistry) – University of Sydney, 2009
  • Graduate Diploma (Science) – University of Sydney, 2010
  • Doctor of Philosophy (Science) – University of Sydney, 2016
  • Graduate Certificate (Applied Statistics) – Charles Sturt University, 2018

Current projects

  • Hazelnuts in Australia: productivity and economic analysis for industry expansion (Agri Futures; Project leader; 2018-2022)
  • Advanced production systems for temperate nut crops (ST16002 managed by Hort Innovation under the Australian Government Department of Agriculture and Water Resources (DAWR) Rural Research and Development Program; Leader for NSW DPI project; 2016-2020)
  • Characterisation and management of non-pollination fruit drop in English walnut (Juglans regia) (Charles Sturt University, Websters Pty. Ltd.; 2017-2020; PhD Supervisor)
  • Identifying non-pollination as a causative factor in fruit drop in walnuts using microscopy (Hort. Innovation WN13002; Collaborator; 2015-2017)
  • An objective basis for temperate nut expansion (Hort. Innovation MT14041; Leader; 2015-2016)

Recent publications

Please refer to Jacquelyn Simpsons’ ResearchGate page

Contact details

Phone: (02) 6391 3801
Location: Orange Agricultural Institute