John Piltz

Research interests

  • Integrated crop and livestock production systems in southern NSW
  • Conserved forages to improve productivity and sustainability of livestock industries
  • Cereal and cereal/legume forage crops for hay and silage production
  • New legume species in mixed farming systems
  • Effect of ensiling on weed seed viability
  • Forage production and conservation as part of Integrated Weed Management
  • Feed quality evaluation


John is based at the Wagga Wagga Agricultural Institute and conducts research of relevance to southern farming systems, livestock nutrition and forage conservation. He currently supervises NSW DPI’s component of three projects: ‘Addressing Herbicide Resistance – Options and Non-Chemical Approaches for Mixed Farmers’ and ‘Developing profitable dairy and sheep meat production systems in Central Tibet’ and ‘New generation NIRS calibrations to improve feed evaluation and animal growth predictions’. He is also involved in the supervision of post-graduate students and provides technical support to NSW DPI’s Feed Quality Service.


  • B.Sc. (University of New South Wales)
  • M.Rur.Sc. (University of New England)

Recent publications

Sajid Latif, Saliya Gurusinghe, Paul A. Weston, William B. Brown, Jane C. Quinn,  John W. Piltz and Leslie A Weston (2019) Performance and weed suppressive potential of selected pasture legumes against annual weeds in southeastern Australia. Crop and Pasture Science 70: 147-158.

Quinn, J. Combs, M. Edwards, S. Scherpenhuizen, J. Narayan, E. Raidal, S. & Piltz, J (2018) Bromide mitigates ataxia and reduces tremor in lolitrem B intoxicated sheep. New Zealand Veterinary Journal (Submitted).

M.A. Combs, S.H. Edwards, J.M. Scherpenhuizen, E.J. Narayan, A.E. Kessel, J. Piltz,  S.R. Raidal, J. Ramsay & J.C. Quinn (2018) Development of a model for investigation of perennial ryegrass toxicoses in sheep. New Zealand Veterinary Journal 66:6 281-289, DOI: 10.1080/00480169.2018.1492986.

M.S. Tufail, G. Krebs, A. Southwell, J. Piltz and P.C. Wynn (2018) The effect of Rhizobium seed inoculation on yields and quality of forage and seed of Berseem clover (Trifolium alexandrinum L.) and its impact on soil fertility and smallholder farmer’s income Journal of Animal and Plant Sciences 28 (5).

Piltz J W, Stanton R A and Wu H (2017). Effect of ensiling and in sacco digestion on the viability of seeds of selected weed species. Weed Research 57 (6): 382-389. Published online: 14 SEP 2017 | DOI: 10.1111/wre.12269

Tufail MS, Neilsen S, Southwell A, Krebs GL, Piltz JW, Norton MR and Wynn PC (2017) Constraints to adoption of improved technology for berseem clover (Trifolium alexandrinum) cultivation in Punjab, Pakistan. Experimental Agriculture . Published online: 2 November 2017. DOI: 10.1017/S0014479717000540

Belinda Hackney, Simon Flinn, Jeff McCormick, John Piltz, Rowan Smith and Susan Orgill (2019) The role of indeterminate growth, rooting depth and maturity time in establishing a legume seedbank under drought conditions. Proceedings of the 19th Australian Agronomy Conference, 25-29 August 2019, Wagga Wagga, Australia.

Sajid Latif , Paul A. Weston, John W. Piltz, Saliya Gurusinghe, William B. Brown, Jane C. Quinn, and Leslie A Weston (2018) Weed Suppressive Potential of Selected Pasture Legumes against Annual Weeds in Southeastern Australia. Proceedings of the 21st Australasian Weeds Conference, Sydney, NSW, Australia.

Watt, L., Krebs, G., Piltz, J., Hackney, B., & Friend, M. (2018). Temporal change in rumen parameters of sheep fed either arrowleaf clover, biserrula or French serradella pasture ad libitum in late spring-summer. In Proceedings of the 10th International Symposium on the Nutrition of Herbivores, September 2-6, 2018, Clermont-Ferrand, France.

L.J. Watt, G.L. Krebs, J. Piltz, B. Hackney and M.A. Friend (2018) Diet selection and growth rates of lambs fed second generation legumes or lucerne oversown with forage oats in winter. Proceedings of the Australian Society of Animal Production, 2-4 July, Wagga Wagga, Australia.

L.J. Watt, G.L. Krebs, J. Piltz, B. Hackney and M.A. Friend (2018) Lambs grazing second generation annual pasture legumes arrowleaf clover, biserrula and bladder clover have similar growth rates in spring as lambs grazing lucerne pasture. Proceedings of the Australian Society of Animal Production, 2-4 July, Wagga Wagga, Australia.

K.L. Bailes, J.W. Piltz, D.M. McNeill (2018) Digestibility differences between sheep and cattle fed silage based diets. Proceedings of the Australian Society of Animal Production, 2-4 July, Wagga Wagga, Australia.

K.L. Bailes and J.W. Piltz (2018) The precision of the pepsin cellulase assay in predicting the in vivo digestibility of silage and hay. Proceedings of the Australian Society of Animal Production, 2-4 July, Wagga Wagga, Australia.

Chen Shaofeng, Duojidunzhu, Hayley Norman, John Piltz (2018) Biomass production of typical forages in central Tibet. Proceedings of the Australian Society of Animal Production, 2-4 July, Wagga Wagga, Australia (accepted).

Belinda Hackney, Clare Edwards, John Piltz, Michael Friend, John Howieson (2017) Producer perceptions of feedbase limitations to livestock production and requirements for amelioration.Proceedings of the 18th Australian Agronomy Conference, 24-28 September 2017, Ballarat, Australia.

Zhuoga, Xiangba, Piltz JW, Wilkins JF and Friend MA (2016). Effect of supplementing barley straw with lucerne silage or cottonseed meal on diet digestibility and growth rate of steers. Animal Feed Science and Technology 218: 84-92.

O’Keeffe PA, Orchard DJ, Orchard BA, Piltz JW and Clayton EC (2014). Native Australian shrub legume species may provide an alternative feed source for livestock. Animal Production Science 55: 1090-1096.

Piltz J, Hackney B, Rodham C and Wilkins JF (2014). Potential Value of Livestock Production from Triticale/Pea Forage Crops in Southern Australia. In ‘Harnessing the Ecology and Physiology of Herbivores’ Proceedings of the Joint International Symposium on the Nutrition of Herbivores/International Symposium on Ruminant Physiology, 8-11 September 2014, Canberra, Australia (TBD).

Marsetyo, Tufail MS, Mbuku SM, Mutimura M, Guo XS and Piltz JW (2013). Utilisation of conserved forage to improve livestock production on smallholder farms in Asia and Africa. In ‘Revitalising grasslands to sustain our communities’ Proceedings of the 22nd International Grasslands Congress, 15-19 September 2013, Sydney, Australia (NSW Department of Primary Industries).

Ann McNeill, John Wilkins, John Piltz, Nyima Tashi, Se Zhu, Jin Tao, Tsamyu, Tim Heath, Colin Brown, Scott Waldron, Jay Cummins, Carol Rose, David Coventry and Nick Paltridge (2013). Integrated crop and dairy systems in Tibet Autonomous Region, PR, China. Australian Centre for International Agricultural Research project LPS/2006/119 – Final Report, April 2013, 86 pp.

Heath T, Jin T, Brown C, Waldron S, Wilkins J, Piltz J, Cummins J, Rose C, Coventry D and McNeill A (2012). Integrated agronomic and economic analysis of fodder options for Tibetan farming systems. In ‘Capturing Opportunities and Overcoming Obstacles in Australian Agronomy’ Proceedings of the 16th Australian Agronomy Conference, 14-18 October 2012, Armidale, Australia.

Stanton R, Piltz J, Rodham C and Wu H (2012) Silage for managing weeds. In ‘Developing solutions to evolving weed problems’ Proceedings of the 18th Australasian Weed Conference (Ed. V Eldershaw), Weed Society of Victoria Inc , 8-11 October 2012, Melbourne, Australia.

Professional associations and activities

  • Australian Society of Animal Production
  • Adjunct Research Fellow Graham Centre for Agricultural Innovation

Fields of research

  • 070107 Farming Systems Research
  • 070203 Animal Management
  • 070204 Animal Nutrition
  • 070307 Crop and Pasture Production not elsewhere classified

Contact details

NSW Department of Primary Industries
Wagga Wagga Agricultural Institute
Pine Gully Road
Private Mail Bag
Wagga Wagga, NSW, 2650

Telephone: (02) 6938 1839
Fax: (02) 6938 1809
Email: john.piltz@dpi.nsw.gov.au