Key trends included challenges with mental health, technology and government regulation.
DairyNZ chief executive Dr Tim Mackle said it was encouraging to see 94 per cent of farmers reported they were proud to be working in the dairy industry.
At the same time, 62 per cent said they or someone on their farm had experienced mental health issues over the last year.
Corbett believed it was much more common than people thought.
His personal and professional relationships were strained, and he often stormed off in frustration on the farm and at home.
The cow shed had become claustrophobic and he had to get out. His wife was at her wits end and something had to be done.
Once he had spoken to a GP and was encouraged to tell people about it, he came clean with everyone he had spent time around.
"They said they knew," he said.
"The more we talked about it, the more accepting and understanding they became."
His advice to anyone hitting a rough patch was to have a conversation about it, especially during Covid-19.
"It can be bloody rough out there. I often cannot hack a full day at the saleyards and if you share what is going on, people are understanding. Do not let this illness hold you back."
Corbett loved milking cows and would have kept working on the farm full-time if he could.
"It is hard to see why some people get sick of it because you have such a captive audience. But my brain can no longer manage it."
Taking medication had changed his day and he implored others to share what they might be going through.
"Talk about it — you should not hide it. This nasty thing creeps up and smacks you in the back of the head. The load is easier when shared."
Where to get help:
Rural Support Trust: 0800 787 254
Lifeline: 0800 543 354 (available 24/7)
Suicide Crisis Helpline: 0508 828 865 (0508 TAUTOKO) (available 24/7)
Youthline: 0800 376 633
Kidsline: 0800 543 754 (available 24/7)
Whatsup: 0800 942 8787 (1pm to 11pm)
Depression helpline: 0800 111 757 (available 24/7)
If it is an emergency and you feel like you or someone else is at risk, call 111.