You can place it by clicking on an empty spot. How far you can place it down depends on the farmer's reach, just like for placing down harvested potatoes.
This is decent, but the blatant theft from world of warcraft is just pathetic. I mean, a monk throwing a keg? Come on, you're not even trying to pretend you have any creativity!
PROTIP: If you're going to be a villain and take over the world, choose a name other than Rita. "Rita the evil witch" is like "Bob the dark lord" - your minions are going spend the whole time snickering instead of following orders.
Hot air balloon enthusiast 1: "Lets take our balloon up and watch the launch from above! It'll be an awesome view!"
Enthusiast 2: "I see no flaw with that plan. Let's go!"
You can place it by clicking on an empty spot. How far you can place it down depends on the farmer's reach, just like for placing down harvested potatoes.