Agricultural farming extended.
CurseForge: CurseForge
FTB Thread: FTB Thread
AgriCraft internals (such as MineTweaker3 integration) are documented here in the GitHub Wiki (Link). Reason is that this kind of information is, most of the time, only needed by pack creators and not the average user.
MineTweaker3 integration is currently in development. If you need support for specific modifications head over to the FTB Thread and leave us a message. Alternatively you can leave an issue in the GitHub tracker. Make sure though, that the requested feature is not currently in development by checking the GitHub Wiki and / or the GitHub issue tracker.