AutoFarm is a plugin where you can run through your fields and break your crops. It will automatically deduct 2 (by default, see config) planting seeds from the item you broke and then replant it after a specific amount of time. You can change that in the config file. In order to not activate the plugin, you must shift break a crop. The items also go into your inventory directly. You can disable the plugin for a specific player individually with the command listed below. You can also edit the messages in the config file.
Commands: /farmer (show all sub commands) (permission = farmer.use)
/farmer toggle (toggles the plugin on or off per player) (permission = farmer.toggle)
/farmer autocollect (toggles the autocolletion on or off per player) (permission = farmer.autocollect)
/farmer reload (reloads the farmer config file) (permission = farmer.reload)
Config: You can change the enabled | Disabled | Reload | Usage messages. You can change which crops are active. You can change the number of cost per replant.
Plugin not working? Did you enable it with/farmer toggle (per player toggle, reload resets it to off.)
Update Checker: When you join it will let you know if your version of Farmer is out of date. The console also has this check. (permission = farmer.updatecheck)