Explanation of a contract to purchase land

[Scott Johnson]

Okay, here's my newbie question - 

I plan to purchase vacant land from owners that are out of state and tax delinquent. Since these owners would not be local to me in most cases, I would use a mobile notary service to finalize the transaction.

For my purchase, I would use the contract available from US Legal, found here:

http://www.uslegalforms.com/us/US-00472B.htm

My question: is there a place where I can get a layman's explanation of what the meaning is for the various sections of that contract, and how they should "typically" be completed before I send it to the seller?

Thanks.