TexasKC:

Like Mr. T said above, the most common 1-d ag appraisals do not transfer to new owners. You were asked to sign that form so that the new buyer felt comfortable that he would not get hit with rollback taxes in the future. You were promising you had actually used it for ag in the past, etc. The new owner has to qualify for ag use. Most people are talking about 1-d appraisal.

An exception to that can be if the property itself is 1-d-1 ag open space, that is very uncommon though. 1-d-1 appraisal stays in place until a change of use.