Farm is a feature to player can send troop in order. The feature support 4 types of attack (Reinforcement, Raid, Attack, Siege). Feature Farm accept value -1 in amount of troops that mean the program will send all amount of that type of unit even zero.
Queue Items can be added by clicking on "+FarmEx" button of village's detail page. Click "Edit" to begin editing amount of units, then click "Check" to end editing.
You have to click Save button after adding items. Checking before save is necessary if you want to avoid mistakes.
Tip: If you don't want targets disappear after attack, lets use FarmEx.