What can a man that owns land for agriculture be called without using "farmer"?
Does anybody know?
agriculturalist, grower, rancher, market gardener, agrarian......
"Agricultural/Rural Land owner" or just "Land owner" is also an alternative.
"Agricultural landowner" is your best bet.
"Agricultural tenant" implies that he rents the land FROM someone else (and is thus not the owner). "Agricultural landlord" implies that he rents it TO someone else, which may not be the case you are looking for. A landlord is a landowner but a landowner is not necessarily a landlord.