Ironwood Management
A good question was brought up regarding "ironwood"...should it be hinged, should we cut and treat it or simply leave it alone?
Ironwood; eastern hop-hornbeam Ostrya virginiana
My purpose here is helping people improve their habitat for whitetails with emphasis on holding mature whitetail bucks on their property so I try to use caution to always provide facts and supporting data rather then "opinion". I have decades of experience and work with landowners across SE Iowa where I have physically done timber stand improvement and been able to observe the results. I do all of that following the advice of a number of very experience foresters, all with varying thoughts on timber management and then combine that with whitetail management goals that also varies among landowners. I share that because it is important to know the information I post is trustworthy and backed up by facts and actual experience on more then just a few acres.
Landowners may have very different goals so it is my goal to give good information that allows the landowner to make good habitat choices that are right for them. If the primary goal is holding mature whitetails then habitat improvements may be very different then if the landowner prefers to manage solely for timber and agricultural interests so it is important on a forum to remember that your goals may not be the same as those of others.
Ironwood is a shade tolerant tree that can grow quite comfortably under the canopy of large trees such as oak and hickory. I took these pictures today while doing TSI today...
I fairly large ironwood tree
under the canopy of very large and nearly mature oaks
Because ironwood trees are shade tolerant they can inhibit oak regeneration and hence are considered a "weed tree" but the key here is understanding "oak regeneration" and when that actually occurs? Typically oak regeneration is often greatest right after a harvest when the canopy is removed and there is soil disturbance and it is at that time when competitive weed trees such as ironwood are often cut and treated with herbicide.
Generally a timber harvest is followed by timber stand improvement to kill weed or cull trees and allow the remaining unharvested trees to grow and it is at that point we might cut and kill ironwood. I did this very thing on one TSI job last winter, we hinged the ironwood to give us more ground cover but treated probably 80% of the hinged ironwood with Tordon RTU
Oak Regeneration
This spring we will interplant red cedars among the open areas to increase bedding opportunities and because of the harvest the year before there is already plenty of oak regeneration.
That then is an example of when killing the ironwood might be the best option so when might we just hinge it and allow it to re-grow? When the oak timber is relatively mature such as shown here...there will not be any oak regeneration or at best it will be minimal.
The canopy from the large existing oaks is as bad or worse then the ironwood and there will be almost no regeneration, so in this case there is simply no valid reason to kill the ironwood.
The assumption here is that most people reading this thread are interested in holding mature whitetail bucks on their property and to do that we need thick, dense understory...BRUSH! In large mature timber that is next to impossible but we take advantage of every opportunity to create any ground cover at all and in this case ironwood may be one of the only viable options.
Many foresters may see it this way...the only good ironwood is a dead one, but from our standpoint of whitetail habitat it can serve a purpose until such time that you may be ready to do a harvest.
So what happens when we do radical hinging/cutting and severely open up canopy?
This is what happens most frequently in SE Iowa....oaks leap to life and quickly dominate
Large trees were felled and broke off the hinged trees in these pics but in open sunlight the oaks quickly out grew the ironwood in part because the ironwood thrives best in shade rather then open full sun.
The lack of canopy allows young oaks to grow rapidly along with blackberry brambles and other sun loving forbs and plants.
In smaller woodlots you have the option of micro managing small areas where some weed trees are chemically treated and oaks planted and tubed in those areas, while other areas are allowed to become thicker cover.
Hinging itself is not for everyone, regardless of species and each landowners habitat and whitetail management goals may vary widely but based on the facts you can make decisions that will be right for you. There is no across the board right/wrong way to manage your timber or habitat in general...you have options...choose the ones that will work best to meet your goals....