Massey University agricultural science student Graham Johnson, 21, came second.
He won awards for championing environmental best practice, showcasing innovation and the food prize.
Massey University student and two-time world archery champion Benjamin Orchard, 20, placed third.
The Young Farmer of the Year is an iconic contest which began in 1969 and showcases the country's agri-food sector.
The contest is supported by FMG, Ravensdown, Honda, WorkSafe, Zero Harm Farm, STIHL, Lincoln University, Massey University, Southfuels, Northfuels, Betacraft and New Holland.
Taranaki/Manawatū regional final results:
1st Alex Field 2nd Graham Johnson 3rd Benjamin Orchard
Innovation Award: Graham Johnson People Award: Alex Field Food Award: Graham Johnson Environment Award: Graham Johnson Technology Award: Alex Field