Bought a farm that had a no recombining clause in the lease. It kept us in control when the shale boys showed up buying old leases from companies.

Shale activities brought out a lot of give us your land type leases. Watch wording very carefully. NO handshake agreements or changes. 

Royalties should be paid on gross of production. This net after transportation, processing, ect is crap. It leaves your income open to many cost deductions. See the Farm and Dairy site about the suit against Chesapeake Oil.