Impacts of greater lifetime production on emissions and profitability in dairy and wool systems

Photographer: Craig Davies

Whole farm systems analysis from the WFSAM project

Researchers studied two options for reducing emissions over an animal’s lifetime: 1) changing from an annual calving system to extended lactation system on dairy farms and 2) increasing the longevity of ewes on wool enterprises to produce an extra year of wool and offspring.

Extended lactation produced lower total emissions and emissions intensity than annual calving and also resulted in higher operating profits. Increasing longevity of ewes led to similar emissions to the baseline scenario, largely as a result of similar stocking rates.

Primary researchers


Browne N, Behrendt R, Kingwell R, Eckard R (2014). Does producing more product over a lifetime reduce greenhouse gas emissions and increase profitability in dairy and wool enterprises? Animal Production Science, 55, 49-55,

More information

Research Theme


Project Status


Project Leadership

Dr Christie Ho
  • Dr Christie Ho
  • Senior Research Scientist
  • Agriculture Victoria

Richard Eckard
  • Professor Richard Eckard
  • Director
  • Primary Industries Climate Challenges Centre

Richard Rawnsley
  • Dr Richard Rawnsley
  • Senior Research Scientist
  • Tasmanian Institute of Agriculture

Fact Sheet

Project Team

  • Dr Brendan Cullen
    University of Melbourne
  • Dr Matthew Harrison
    Tasmanian Institute of Agriculture
  • Dr Alexandria Sinnett
    Agriculture Victoria
  • Karen Christie
    Tasmanian Institute of Agriculture
  • Natalie Doran-Browne
    University of Melbourne

Funding Organisations

  • Agriculture Victoria
  • Australian Wool Innovation Limited
  • Dairy Australia
  • Department of Agriculture and Water Resources
  • Meat and Livestock Australia
  • Tasmanian Institute of Agriculture
  • University of Melbourne

Collaborating Organisations

  • Agriculture Victoria
  • Tasmanian Institute of Agriculture