They compete at district and regional level to win the right to represent one of seven regions in the grand final.
The 2014 finalists competed for more than $300,000 worth of prizes with the winner, David Kidd from Shelly Beach, South Kaipara, scooping a prize package worth nearly $70,000.
By 2011 only two women had made it through to the grand final.
Denise Brown was a finalist in 1981, as was Louise Collingwood in 2003, when she was runner-up, and 2004, when she finished third.
The grand final involves three days of physical and intellectual challenges that are designed to test the business skills of competitors as well as their ability to complete farming tasks.