As far as i know the only license required is a commercial pilot, and an ag course. Leading edge in yorkton sk does a good job and there course usually runs in early spring.
PM me if you want more info
If you do a search of thread titles on this site for "Ag flying" you may find a thread from quite a while back where Flybabe and others in the know had some good knowledge to share.
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Please don't tell my mother that I work in the Oilpatch...she still thinks that I'm the piano player at a whorehouse.
Lil´Duck is doing fine we flew about 400 hours and 56.000 hectares, ready to come back home soon.(Longest season I've had so far)
I have some pictures and will share them as soon as I can get out of here.
Hope there has been enough snow back home so farmers have good moisture for the Spring. Trying to keep her out of the trees these last days ....