A lease in itself, is an agreement to lease. All the same.

No, a lease agreement does not have to be notarized.

A profit sharing lease is an agreement between a landowner and a farm operator. This agreement basically states they will work together to make money from the land.

A lease agreement could be for the cases of private leasing including residential purposes. A commerical lease agreement is leasing for use of businesses.

A landlord can put a witness signature in a lease agreement. A property owner can also sign as a witness to a lease agreement.