Journal Article: Sensitivity of capsicum germplasm to magnesium deficiency growing in the solution culture
Nguyen, P.T., Bell, M.J. and Harper, S.M. (2023). Sensitivity of capsicum germplasm to magnesium deficiency growing in the solution culture. Acta Horticulturae (1375), 137-144. doi: 10.17660/actahortic.2023.1375.18
Journal Article: Phytotoxic effects of Al on root growth are confounded in the presence of fulvic and humic acids
Harper, Stephen and Menzies, Neal (2023). Phytotoxic effects of Al on root growth are confounded in the presence of fulvic and humic acids. Soil Systems, 7 (3) 68, 1-15. doi: 10.3390/soilsystems7030068
Journal Article: Incidence of twisted disease and cultivation practice of shallot farmers in Bantul coastal area, Yogyakarta, Indonesia
Wibowo, Arif, Santika, Islaminati Anna, Syafitri, Luthfiana Mifta, Widiastuti, Ani, Subandiyah, Siti and Harper, Stephen (2023). Incidence of twisted disease and cultivation practice of shallot farmers in Bantul coastal area, Yogyakarta, Indonesia. Journal of Tropical Plant Pests and Diseases, 23 (1), 23-30. doi: 10.23960/jhptt.12323-30
(2023–2027) Australian Centre for International Agricultural Research
Profiling garlic sulfur compounds in a range of cultivars and agricultural practices
(2023) Australian Nuclear Science and Technology Organisation
Crop health and nutrient management of shallot-chilli-rice cropping systems in coastal Indonesia
(2020–2026) Australian Centre for International Agricultural Research
Factors controlling nutrient use efficiency across a range of capsicum germplasm
Doctor Philosophy
Genotypic responses of capsicum to copper toxicity
Doctor Philosophy
(2023) Doctor Philosophy
Sensitivity of capsicum germplasm to magnesium deficiency growing in the solution culture
Nguyen, P.T., Bell, M.J. and Harper, S.M. (2023). Sensitivity of capsicum germplasm to magnesium deficiency growing in the solution culture. Acta Horticulturae (1375), 137-144. doi: 10.17660/actahortic.2023.1375.18
Phytotoxic effects of Al on root growth are confounded in the presence of fulvic and humic acids
Harper, Stephen and Menzies, Neal (2023). Phytotoxic effects of Al on root growth are confounded in the presence of fulvic and humic acids. Soil Systems, 7 (3) 68, 1-15. doi: 10.3390/soilsystems7030068
Wibowo, Arif, Santika, Islaminati Anna, Syafitri, Luthfiana Mifta, Widiastuti, Ani, Subandiyah, Siti and Harper, Stephen (2023). Incidence of twisted disease and cultivation practice of shallot farmers in Bantul coastal area, Yogyakarta, Indonesia. Journal of Tropical Plant Pests and Diseases, 23 (1), 23-30. doi: 10.23960/jhptt.12323-30
Pangestuti, Retno, Sulistyaningsih, Endang, Kurniasih, Budiastuti, Murti, Rudi Hari, Harper, Stephen and Subandiyah, Siti (2023). Phenological growth stage of tropical shallot (Allium cepa L. Aggregatum group) planted from seed in lowland area based on the BBCH scale. Annals of Applied Biology, 182 (2), 257-266. doi: 10.1111/aab.12799
Syafitri, Luthfiana M., Wibowo, Arif, Widiastuti, Ani, Subandiyah, Siti and Harper, Stephen (2023). Short Communication: Molecular identification of Colletotrichum gloeosporioides causing anthracnose on shallot in Bantul, Yogyakarta, Indonesia. Biodiversitas, 24 (8), 4530-4534. doi: 10.13057/biodiv/d240855
Sulfur nutrition affects garlic bulb yield and allicin concentration
Nguyen, Binh Thi, Harper, Stephen M., O'Hare, Tim J., Menzies, Neal W. and Wehr, Bernhard (2022). Sulfur nutrition affects garlic bulb yield and allicin concentration. Plants, 11 (19) 2571, 2571. doi: 10.3390/plants11192571
Detection of two poleroviruses infecting garlic (Allium sativum) in Australia
Nurulita, Sari, Geering, Andrew D. W., Crew, Kathleen S., Harper, Stephen M. and Thomas, John E. (2022). Detection of two poleroviruses infecting garlic (Allium sativum) in Australia. Australasian Plant Pathology, 51 (4), 461-465. doi: 10.1007/s13313-022-00870-z
Cheah, Zhong Xiang, Harper, Stephen M., Hare, Tim J. O’, Kopittke, Peter M. and Bell, Michael J. (2022). Improved agronomic biofortification of sweetcorn achieved using foliar rather than soil Zn applications. Cereal Chemistry, 99 (4), 819-829. doi: 10.1002/cche.10539
A rapid and simplified methodology for the extraction and quantification of allicin in garlic
Nguyen, B.T., Hong, H.T., O’Hare, T.J., Wehr, J.B., Menzies, N.W. and Harper, S.M. (2021). A rapid and simplified methodology for the extraction and quantification of allicin in garlic. Journal of Food Composition and Analysis, 104 104114, 1-7. doi: 10.1016/j.jfca.2021.104114
Detection and distribution of viruses infecting garlic crops in Australia
Cremer, Julia, Campbell, Paul, Steele, Visnja, Persley, Denis, Thomas, John, Harper, Stephen and Gambley, Cherie (2021). Detection and distribution of viruses infecting garlic crops in Australia. Plants, 10 (5) 1013, 1-14. doi: 10.3390/plants10051013
First report of garlic virus E in Australia
Nurulita, Sari, Geering, Andrew D. W., Crew, Kathleen S., Harper, Stephen and Thomas, John E. (2020). First report of garlic virus E in Australia. Australasian Plant Disease Notes, 15 (1) 32. doi: 10.1007/s13314-020-00400-0
Zinc biofortification of immature maize and sweetcorn (Zea mays L.) kernels for human health
Cheah, Zhong Xiang, O’Hare, Tim J., Harper, Stephen M., Kochanek, Jitka and Bell, Michael J. (2020). Zinc biofortification of immature maize and sweetcorn (Zea mays L.) kernels for human health. Scientia Horticulturae, 272 109559. doi: 10.1016/j.scienta.2020.109559
Cheah, Z. X., Harper, S. M., O’Hare, T. J. and Bell, M. J. (2020). Elevated zinc concentration in zeaxanthin-biofortified sweetcorn kernels compared with a commercial hybrid. Acta Horticulturae (1292), 399-404. doi: 10.17660/actahortic.2020.1292.53
Cheah, Zhong Xiang, O'Hare, Tim J., Harper, Stephen M. and Bell, Michael J. (2020). Variation in sweetcorn kernel Zn concentration a reflection of source-sink dynamics influenced by kernel number. Journal of Experimental Botany, 71 (16), 4985-4992. doi: 10.1093/jxb/eraa244
Salas, Rosario A., Godoy, Reyda Mae R., Salas, Felix M., Menzies, Neal, Harper, Stephen and Asio, Victor B. (2020). Yield and postharvest qualities of two genotypes of eggplant (Solanum melongena l.) applied with different levels of chicken dung. EnvironmentAsia, 13 (Special Issue 1), 81-86. doi: 10.14456/ea.2020.25
Cheah, Zhong Xiang, Kopittke, Peter M., Harper, Stephen M., Meyer, Gregor, O'Hare, Tim J. and Bell, Michael J. (2019). Speciation and accumulation of Zn in sweetcorn kernels for genetic and agronomic biofortification programs. Planta, 250 (1), 219-227. doi: 10.1007/s00425-019-03162-x
Cheah, Zhong Xiang, Kopittke, Peter M., Harper, Stephen M., O’Hare, Tim J., Wang, Peng, Paterson, David J., de Jonge, Martin D. and Bell, Michael J. (2019). In situ analyses of inorganic nutrient distribution in sweetcorn and maize kernels using synchrotron-based X-ray fluorescence microscopy. Annals of Botany, 123 (3), 543-556. doi: 10.1093/aob/mcy189
Hahuly, Mayavira V., Sumardiyono, Christanti, Wibowo, Arif, Subandiyah, Siti and Harper, Stephen (2018). Identification of purple blotch pathogen of shallot by PCR using specific primer for Alternaria genus. Archives of Phytopathology and Plant Protection, 51 (3-4), 103-121. doi: 10.1080/03235408.2017.1384196
Trace metal contamination during grinding of plant samples
Bich, Luong Bui, My, Hanh Phung Thi, Dinh, Rinh Pham, Minh, Trang Pham, Trong, Thang Do, Harper, Stephen, Wuhrer, Richard, Huang, Qingtao, George, Laurel, Holford, Paul, Zhao, Chen Chen, Mitchell, Christopher and Milham, Paul (2018). Trace metal contamination during grinding of plant samples. Communications in Soil Science and Plant Analysis, 50 (1), 102-107. doi: 10.1080/00103624.2018.1554671
Growth and yield response of glasshouse- and field-grown sweetpotato to nitrogen supply
Taranet, Prapa, Harper, Stephen, Kirchhof, Gunnar, Fujinuma, Ryosuke and Menzies, Neal (2017). Growth and yield response of glasshouse- and field-grown sweetpotato to nitrogen supply. Nutrient Cycling in Agroecosystems, 108 (3), 309-321. doi: 10.1007/s10705-017-9858-6
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
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
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
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
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
Effect of nitrogen rates on root yield of the medicinal plant Achyranthes bidentata
Nguyen, B., Chu, M., Dang, H., Pham, P., Nguyen, D., Phan, H. and Harper, S. (2023). Effect of nitrogen rates on root yield of the medicinal plant Achyranthes bidentata. International Symposium on Medicinal and Aromatic Plants: Domestication, Breeding, Cultivation and New Perspectives, Angers, France, 14-20 August 2022. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2023.1358.18
Benchmarking mineral concentration, bulb yield and quality across garlic genotypes
Nguyen, Binh , Wehr, Bernhard , O'Hare, Timothy , Menzies, Neal , Hong, Hung and Harper, Stephen (2022). Benchmarking mineral concentration, bulb yield and quality across garlic genotypes. TropAg International Agriculture Conference, Brisbane, Australia, 31 October - 2 November 2022.
Designing high zeaxanthin capsicums
Agarwal, R., Hayward, A., Hong, H., Harper, S. and O'Hare, T. (2022). Designing high zeaxanthin capsicums. Brain and Ocular Nutrition Conference 2022, Cambridge, United Kingdom, 27-29 July 2022. Amsterdam, Netherlands: IOS Press. doi: 10.3233/JAD-229008
Excess nitrogen application reduces root yield of Achyranthes bidentata
Nguyen, Binh, Dang, Ha, Pham, Phuong, Chu, My, Nguyen, Duyen, Phan, Hien, Wehr, Bernhard and Harper, Stephen (2021). Excess nitrogen application reduces root yield of Achyranthes bidentata. The Soil Science Australia and the New Zealand Society of Soil Science Joint Conference, Cairns, QLD Australia, 27 June - 2 July 2021.
Agarwal, Rimjhim, Hong, Hung T., Hayward, Alice, Harper, Stephen, Mitter, Neena and O’Hare, Tim J. (2020). Carotenoid profiling of orange-coloured capsicums: In search of high-zeaxanthin varieties for eye health. 1st International Electronic Conference on Food Science and Functional Foods, Online, 10–25 November, 2020. Basel, Switzerland: MDPI. doi: 10.3390/foods_2020-07717
Agarwal, Rimjhim, Trieu, Hung Hong, Cave, Robyn, Harper, Stephen and O’Hare, Tim (2020). Orange capsicums and chillies as a potential source of dietary zeaxanthin, an important macular carotenoid for eye health. Third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, QLD Australia, 11-13 November 2019. Basel, Switzerland: MDPI AG. doi: 10.3390/proceedings2019036161
The effect of heat treatments and drip line placements on the yield and quality of garlic
Djanie, Alina, Harper, Stephen and Cave, Robyn (2020). The effect of heat treatments and drip line placements on the yield and quality of garlic. Third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, QLD, Australia, 11 - 13 November 2019. Basel Switzerland: MDPI. doi: 10.3390/proceedings2019036120
Allicin and yield: are they friends or enemies?
Nguyen, Binh, Wehr, Bernhard, O'Hare, Timothy, Hong, Hung Trieu, Menzies, Neal and Harper, Stephen (2019). Allicin and yield: are they friends or enemies?. In: TropAg2019, Brisbane, QLD, Australia, (). 11-13 November 2019.
The relationship between bulb yield and allicin concentration in garlic varieties
Nguyen, Binh, Wehr, Bernhard, O’Hare, Timothy, Hong, Hung, Menzies, Neal and Harper, Stephen (2019). The relationship between bulb yield and allicin concentration in garlic varieties. Third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, QLD, Australia, 11 - 13 November 2019. Basel, Switzerland: M D P I AG. doi: 10.3390/proceedings2019036028
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.
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
Wibowo, A., Kaeni, E., Toekidjo, T., Subandiyah, S., Sulistyaningsih, E. and Harper, S. (2016). Responses of four shallot (Allium cepa L. Aggregatum Group) cultivars to moler disease (Fusarium spp.) after bulb treatment. VII International Symposium on Edible Alliaceae, Nigde, Turkey, 21 - 25 May 2015. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2016.1143.11
Selection for root morphological traits improves the growth of grafted bell pepper
Mohd Nor, N.H., Fujinuma, R., Menzies, N.W., Harper, S. and McGrath, D. (2016). Selection for root morphological traits improves the growth of grafted bell pepper. XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014): International Symposium on Plant Breeding in Horticulture, Brisbane, QLD, Australia, August 17, 2014. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2016.1127.33
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
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
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.
(2023–2027) Australian Centre for International Agricultural Research
Profiling garlic sulfur compounds in a range of cultivars and agricultural practices
(2023) Australian Nuclear Science and Technology Organisation
Crop health and nutrient management of shallot-chilli-rice cropping systems in coastal Indonesia
(2020–2026) Australian Centre for International Agricultural Research
Factors controlling nutrient use efficiency across a range of capsicum germplasm
Doctor Philosophy — Principal Advisor
Other advisors:
Genotypic responses of capsicum to copper toxicity
Doctor Philosophy — Principal Advisor
Other advisors:
(2023) Doctor Philosophy — Associate Advisor
Other advisors:
Understanding the mechanism responsible for zeaxanthin accumulation in orange-coloured Capsicum.
(2023) Doctor Philosophy — Associate Advisor
Other advisors:
Virus-infected garlic in Australia and factors affecting disease epidemiology
(2023) Doctor Philosophy — Associate Advisor
Other advisors:
Genetic and agronomic biofortification of zinc in sweetcorn
(2020) Doctor Philosophy — Associate Advisor
Other advisors:
The Effects of Low pH and Aluminium Toxicity on Pythium Damping-off in Cucumber
(2020) Master Philosophy — Associate Advisor
Other advisors:
Nitrogen use efficiency of tomato: Role of root system morphological traits
(2013) Master Philosophy — Associate Advisor
Other advisors:
(2013) Doctor Philosophy — Associate Advisor
Other advisors: