Having been around ag aviation off and on for many years, I have seen both schools of the industry here in the USA. The first school is like FH110 has seen, 'it's just a tractor, a little faster that's all'. And the group that understands that while it is a fast tractor, it can kill you if you're not careful and take some precautions.
Three operators of the first school that I have known, didn't last too long. One didn't have enough aircraft and crashed in the field he was spraying, burning to death. Another, who 'knew' more than his mechanic, died when the engine quit in a turn. And the final one went out of business after losing 2 aircraft.
The operator I know of the 2nd school, while his aircraft were never what one would call pretty, hired the best mechanic he could, paid him reasonably well and let him do his job. If it wasn't right, it's not right and it needs to be fixed. While it may cost you a little bit to fix it right and right now, it costs you less than waiting until something breaks. They didn't wash their aircraft every night, more like once a month if it needed or not.
Ag aviation in this country at least, still operates to some extent on a man's word and handshake. And farmers do understand that things do break and need repairs and that farm safety is important. And despite the industrialization of the farm, farms still tend to be family oriented so it is important that everyone goes home at night in one piece.