Is your farm sustainable?  How can you make your farm sustainable?  The Illinois Farm Sustainability Calculator can help you figure out these things out.  And it's pretty easy to use.  See the list of tabs on the bottom of your screen?  Navigate through them by using the grey buttons at the top of the sheets or by hitting ctrl+page down (cmd+page down on macs)  In each sheet, fill each white box with data from your farm.  Be sure to make a selection in all of the white drop-down boxes too.  If you don't know something, leave the default number or the default selection in place.  If your farm does not have ten separate fields, leave the extra field sheets unchanged.  Same goes for any extra ruminant, swine, and poultry sheets.