Dr

Stephen Harper

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Availability

Dr Stephen Harper is:
Available for supervision

Qualifications

  • Bachelor of Agricultural Science, The University of Queensland
  • Masters (Coursework), The University of Queensland
  • Doctor of Philosophy, The University of Queensland

Search Professor Stephen Harper’s works on UQ eSpace

50 works between 1995 and 2025
All (50) Journal Article (27) Conference Publication (22) Book Chapter (1)

41 - 50 of 50 works

2016

Conference Publication

Nutrient budgeting of shallot (Allium cepa L. Aggregatum group) in Central and East Java, Indonesia

Somala, M. U. A., Wibowo, A., Subandiyah, S. and Harper, S. (2016). Nutrient budgeting of shallot (Allium cepa L. Aggregatum group) in Central and East Java, Indonesia. VII International Symposium on Edible Alliaceae, Nigde, Turkey , 21 - 25 May 2015. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2016.1143.45

Nutrient budgeting of shallot (Allium cepa L. Aggregatum group) in Central and East Java, Indonesia

2016

Conference Publication

Influence of rootstock on photosynthetic activity and yield of Capsicum annuum 'Warlock'

Cave, Robyn, Hall, Zara, Qin, Malin and Harper, Stephen (2016). Influence of rootstock on photosynthetic activity and yield of Capsicum annuum 'Warlock'. International Symposium on Tropical and Temperate Horticulture, Cairns, Australia, 20-25 November 2016.

Influence of rootstock on photosynthetic activity and yield of Capsicum annuum 'Warlock'

2015

Conference Publication

Pseudomonas syringae pv.porri: a new pathogen of Australian onions

Roach, R., McTaggart, A., Gambley, C., Harper, S., Carey, D. and Duff, J.D. (2015). Pseudomonas syringae pv.porri: a new pathogen of Australian onions. XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014): International Symposia on Innovative Plant Protection in Horticulture, Biosecurity, Quarantine Pests, and Market Access, Brisbane, QLD, Australia, 17-22 August 2014. International Society for Horticultural Science (ISHS). doi: 10.17660/actahortic.2015.1105.21

Pseudomonas syringae pv.porri: a new pathogen of Australian onions

2014

Conference Publication

To evaluate the effect of green waste compost on nitrous oxide emissions from horticulture

Vaughan, S. M., Harper, S. M., Dalal, R. C. and Menzies, N. W. (2014). To evaluate the effect of green waste compost on nitrous oxide emissions from horticulture. Ist international symposium on organic matter management and compost use in horticulture, Adelaide, Australia, 4-7 April 2011. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/actahortic.2014.1018.6

To evaluate the effect of green waste compost on nitrous oxide emissions from horticulture

2011

Journal Article

Effect of fresh green waste and green waste compost on mineral nitrogen, nitrous oxide and carbon dioxide from a Vertisol

Vaughan, Sarah M., Dalal, Ram C., Harper, Stephen M. and Menzies, Neal W. (2011). Effect of fresh green waste and green waste compost on mineral nitrogen, nitrous oxide and carbon dioxide from a Vertisol. Waste Management, 31 (8), 1720-1728. doi: 10.1016/j.wasman.2011.03.019

Effect of fresh green waste and green waste compost on mineral nitrogen, nitrous oxide and carbon dioxide from a Vertisol

2010

Conference Publication

Reduction of soil nitrogen losses from a Vertisol with organic waste amendments under subtropical conditions

Vaughan, Sarah M., Dalal, Ram, Harper, Stephen and Menzies, Neal (2010). Reduction of soil nitrogen losses from a Vertisol with organic waste amendments under subtropical conditions. 19th World Congress of Soil Science: Soil solutions for a changing world, Brisbane, Australia, 1-6 August 2010. Brisbane, Australia: International Union of Soil Sciences.

Reduction of soil nitrogen losses from a Vertisol with organic waste amendments under subtropical conditions

2008

Journal Article

A digital imaging technique to quantify the incidence of internal browning in potato (Solanum tuberosum) tubers

Harper, S. M. and Blamey, F. P. C. (2008). A digital imaging technique to quantify the incidence of internal browning in potato (Solanum tuberosum) tubers. Experimental Agriculture, 44 (2), 157-166. doi: 10.1017/S0014479708006315

A digital imaging technique to quantify the incidence of internal browning in potato (Solanum tuberosum) tubers

2000

Journal Article

Characterisation of fulvic and humic acids from leaves of Eucalyptus camaldulensis and from decomposed hay

Harper, S., Kerven, G. L., Edwards, D. G. and Ostatek-Boczynski, Z. (2000). Characterisation of fulvic and humic acids from leaves of Eucalyptus camaldulensis and from decomposed hay. Soil Biology and Biochemistry, 32 (10), 1331-1336. doi: 10.1016/S0038-0717(00)00021-3

Characterisation of fulvic and humic acids from leaves of Eucalyptus camaldulensis and from decomposed hay

1998

Journal Article

Effects of humic and fulvic acids on the rhizotoxicity of lanthanum and aluminium to corn

Diatloff, E., Harper, S. M., Asher, C. J. and Smith, F. W. (1998). Effects of humic and fulvic acids on the rhizotoxicity of lanthanum and aluminium to corn. Australian Journal of Soil Research, 36 (6), 913-919. doi: 10.1071/S98018

Effects of humic and fulvic acids on the rhizotoxicity of lanthanum and aluminium to corn

1995

Journal Article

Effects of organic acid fractions extracted from Eucalyptus camaldulensis leaves on root elongation of maize (Zea mays) in the presence and absence of aluminium

Harper, S.M., Edwards, D.G., Kerven, G.L. and Asher, C.J. (1995). Effects of organic acid fractions extracted from Eucalyptus camaldulensis leaves on root elongation of maize (Zea mays) in the presence and absence of aluminium. Plant and Soil, 171 (1), 189-192. doi: 10.1007/BF00009586

Effects of organic acid fractions extracted from Eucalyptus camaldulensis leaves on root elongation of maize (Zea mays) in the presence and absence of aluminium

Current funding

  • 2023 - 2027
    Managing heavy metals and soil contaminants in vegetable production to ensure food safety and environmental health in the Philippines
    Australian Centre for International Agricultural Research
    Open grant
  • 2020 - 2026
    Crop health and nutrient management of shallot-chilli-rice cropping systems in coastal Indonesia
    Australian Centre for International Agricultural Research
    Open grant

Past funding

  • 2024
    Medicinal and culinary properties of sulfur compounds in garlic and other allium species
    Australian Nuclear Science and Technology Organisation
    Open grant
  • 2023
    Profiling garlic sulfur compounds in a range of cultivars and agricultural practices
    Australian Nuclear Science and Technology Organisation
    Open grant

Availability

Dr Stephen Harper is:
Available for supervision

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Supervision history

Current supervision

  • Doctor Philosophy

    Impact of metal ions on acidic vegetable production soils.

    Principal Advisor

    Other advisors: Professor Peter Kopittke

  • Doctor Philosophy

    Soil fertility constraints to vegetable production on tropical upland acidic soils

    Principal Advisor

    Other advisors: Professor Peter Kopittke

  • Doctor Philosophy

    Genotypic variation in Capsicum root growth to key constraints associated with acidic soils: responses to H¿ and Al³¿ and Ca2+ in solution culture

    Principal Advisor

    Other advisors: Professor Peter Kopittke

Completed supervision

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