I noticed this was a issue with the a lot of maps that have crops that dont use just normal combines Ill reach out to Iron and see if he has found a work around for this as far as I know the handler for this (meaning how to tell the game to give mowers instead of harvesters) is locked inside of the dataS folder so not sure if its fixable as Giants doesn't allow modders access to this folder and being crossplay we cant have our own scripts best we might be able to do is tell the game there is no missions allowed for this which unfort means that there wont be any NPCs that plant these by default either
Viewing post in Wampsville V1.0.0.0.PublicBeta.9.1 - Patch Notes comments
Okay upon Further Investigation I did pull up the fruitType and as of the most recent updates (9.0 of Wampsville and newer) which have already disabled the AI planting of Clover and Alfalfa (pulled from Fruit updates from Gnadenthal so I didn't realize it was already done) This being said, are you running a new save since 9.0? If not this would be part of the problem of why its still giving the missions. If so i would like to know so i can try to dig in further as to why it is still happening on new saves if the game is being told not to let AI plant them.