Hello,
There are no restrictions on logging (no clear cutting, of course) so long as it fits a reasonable forest management plan.
Just get an aerial photo of the property from the county recorder's office. Take it to the assesor and they will be able to determine acreage via scale of the photo. You then tell them how much of the timber ground you want to enroll, agree to their rules, and that is that. Takes about 5 minutes, as pharmer said. Some counties may take things a bit further and want to come out and take a look-see first.
You may not find much info on the Forest Reserve program. Since it basically keeps money out of the county tax system, it isn't widely advertised. Just like most of the governement programs. You have to somehow dredge up the information yourself.
Good Hunting...Raven