Twins will represent the South after winning the Junior Young Farmer of the Year Otago Southland title.
Siblings and Dunedin pupils Zoe McElrea, of Columba College, and Millar McElrea, of John McGlashan College, were crowned the champions after taking on a range of practical and theoretical modules at Waimumu, near Gore, on February 12.
Zoe said she would do plenty of study and preparation for the national final in Northland in July.
"We'll get dad to take us around the farm and do some fencing."
New Zealand Young Farmers events manager Staci Barnette said the contest season faced some challenges this year.