I may be getting the wrong impression from some of the above posts, and no offense intended, but I would say there is some outdated thinking in some of the above. Yes, for a long time it was thought that turkeys needed vast expanses of mature timber with open understories. That train of thought has been changing and more and more we are learning that turkeys can be much more adaptive than previously thought. There is plenty that you can do!
Turkeys have specific needs absolutely. Roosting areas, which they prefer to roost in mature timber over or near water. They need nesting cover which ideal nesting cover consists of grasses, forbs, hardwood sprouts that afford overhead and lateral cover. They also need bugging cover - in close proximity to nesting cover. Bugging or brood-rearing cover is young succulent vegetation with high insect populations that provide overhead protection from predators and easy walking for poults. The ideal situation is where the hen can see over the vegetation to watch for predators while the poults forage in and under vegetation.
Those are the basics. Gobblers also like open areas where they can strut in the spring to attract hens. Both sexes like hardwood mast areas in the fall and winter, however chufa has long been recognized as a quality substitute for acorns in pine-dominated habitats.
We are now understanding the importance of habitat diversity and juxtaposition (how different habitat types are arranged) with a preference towards having as many different habitat types as possible bordering each other with travel corridors between habitat types. Regardless of how many acres you have, you absolutely don't want it all the same.
In SC, both in the piedmont and coastal plain, we manage old field habitat with burning and rotational winter discing. We manage pine timber with burn rotations that vary from 1-5 year return intervals. We manage hardwoods for mast production and have worked to vary the age structure of hardwood stands to guard against catastrophic loss. We leave buffer strips around creeks and drainages for roosting when cutting timber, but make no mistake, we cut timber. We have daylighted roads and cut miles and miles of firebreaks that are maintained as wildlife travel corridors.
I would encourage you to get in touch with your local NWTF biologist and ask them to come out and help you do an assessment of your tract and help you define your limiting factors. Then based on that knowledge, figure out what you can and cannot do.
I will throw this in - I have a farm in the coastal plain and a farm in the piedmont. In both locations the objective has been to improve habitat for all wildlife with a specific focus on quail, turkeys and deer. What I see on my places, as well as other places managed with similar goals - early successional habitat is almost always the limiting factor and the more you can do to create it the better results you will see. If you want turkeys, or quail for that matter - your biggest struggle is almost certainly going to be managing the zone between the buckle on your belt and the sole of your boot!
Remember this too - native plants are your best friends. We are in a heck of a dry spell right now. The only agricultural plantings that are still alive are those under irrigation. The natives are taking it all in stride and carrying on as they always do. Nothing against clover, chufa, wheat and sorghum, they all have their place, but you need to first look at your native plants and figure out how to maximize them.