<font color="blue"> Any revenue generated from renting out your land does not count. </font>
AndyMA, while the rent received does not count toward the gross revenue, I believe that the revenue generated by whomever has leased the land does generally count. In other words, as I understand it, any revenue generated on/by the land, even by someone else through a lease (I believe a legal lease is necessary), counts as gross revenue for the owner of the land toward satisfaction of an ag exemption. Of course, this can vary from locality to locality.
Upon further reflection, it is possible that by "revenue generated" you do in fact mean that generated by the agricultural enterprise and NOT the rent money received. If this is the case, then obviously your locality does not fit the model I described above. Apologies if I misunderstood your sentence.