"The pathways that today's graduates find themselves on will be a maze of opportunity," Mr Nelson said.
He also reminded the graduates of the importance of safety in the agriculture industry.
"Statistics from Australia and New Zealand are identifying a high accident rate in the 60 plus category. For the young men and women here today I urge you to keep your safety practices that you developed while at Taratahi."
After a final speech from Tim Fowler, chief executive of the Tertiary Education Commission, students took to the stage to receive their certificates and awards.
The top award, the Taratahi Cup, for the best overall student, went to 18-year-old Kelly Poehls, from Wellington. Miss Poehls also took out the Richard Mills/Taratahi Scholarship and the East Coast Sheep and Beef Council award for the most improved dog handler.
Miss Poehls said she developed an interest in agriculture growing up next door to her uncle's farm and loved being outdoors.
She said she would be working as a junior shepherd over summer and then studying agriculture at Lincoln University next year.