Fields of gold: Australia’s wheat industry contributes more than A$5 billion to the economy each year. Wheat image from www.shutterstock.com January 24, 2017 Changing climate has stalled Australian wheat yields: study Zvi Hochman, CSIRO; David L. Gobbett, CSIRO, and Heidi Horan, CSIRO Australia’s wheat harvest has stalled over the past 26 years, and worsening weather is to blame.