How do you get Farm Cash on Farmville on Facebook?

I would read this

*Note.. I hate TechCrunch.

You can give the game developer money, sign up for a service of some sort, or sign up to get spammed. One suggestion: if you want to get Farm Cash by signing up for the surveys and so on, skip the ones that want to text you something, and use an email address that is yours but not your main one. The spam gets sent there but your main account is safe.

OK well can’t you get it by doing other stuff?

You can buy it. I’ve never had to buy any farm cash (and refuse to).

You can raise crops and herds to get to a point where you can “buy” all the extra barns and stuff with the profits from your farming. Some people just don’t want to wait that long.

Every time you advance a level you get farm cash.