Thinning forest

   / Thinning forest #11  
One of the projects on my to-do list is to thin out the forest surrounding my family's place. Total forest area of about 3-4 acres, maybe up to 6-7 depending on how industrious I get. Basically want to get rid of a lot of the young growth (2-3" trees), etc..., but not trying to clear everything. Trying to figure out the best way to go about it. No big rush... will work on this over the summer when I can. I also have a Stihl MS290 chainsaw, and an FS90 string trimmer.

Been at this off and on for 5 yrs. 12 acres of steep, pretty woods w/ some rare plants/trees/amphibians but overgrown with skinny poplars that shoot up 60-80 ft tall then fall over, creating impassable tangles of trunks. They had already shaded out and killed the rare red pines (still hoping to find one left someday) and were crowding the chestnuts and wild cherrys. So some thinning would help this forest but there was a lot I wanted to preserve if possible.

First, I think it helps to plan some. Think about how (and if) you want to use different parts. Don't want to start thinning and realize you're no longer screened from a road or a neighbor. Can't put it back.

As far as selectively thinning tall saplings, we did hundreds of them and for 2" saplings IMO the trimmer with the sawblade attachment is quick and easy, esp on hills and esp if you want it cut close to the ground. Chainsaw very difficult because you're cutting sideways and either leave too much stump or get your chain in the dirt. Above a certain height, the trimmer becomes too dangerous IMO as you have little control over the fall. In fall-winter-spring with no leaves, even a 60 foot sapling is pretty light. Just twitch it out by hand to the nearest path where your equipment awaits. Cut in half if necessary for transport. When you have a dozen or so, throw a rope or chain around the trunks and tow them to your burn pile. THEN buck them, or just cut the tops off and burn/chip those and use the long skinny poles for projects. Quickest, least destructive method IMO. Do one area at a time. Clear the deadfall first, then the smallest brush/saplings, then step back and have another look and select a few larger trees to clear, and so on, until you get there. As an alternative to burning, I rented a huge tow-behind chipper that you could feed an entire tree up to 6" thick and it chipped a 40 footer in less than a minute. Nice bonus--ended up with a compost pile the size of a school bus. This is a Very Dangerous Machine and I hired a crew to work it.

If you want paths, try using existing deer paths plus any remnants of former farming/logging paths--less work, less destruction. Then minimal scraping to keep them clear for walking/tractoring. Overhangs are trimmed, and since people walk there, some deadwood is cleared on the sides. A deadfall off to the side can be picturesque, or ugly. If ugly, it is removed. I do any path scraping mostly in winter so as not to scrape off the moss, tiny ferns, and wood violets that grow over the paths starting in spring.

Consider leaving some areas untouched, maybe with a small footpath nearby. Many critters prefer dense undisturbed forest. The yellow-billed cuckoo, the whipporwills, the wood thrush (my favorite), flying squirrels, and who knows what else, which is the point. My farmer neighbor did some extensive logging along his fence lines last year and I haven't heard the cuckoo or seen a red squirrel since. The edges where this untouched forest meets open grass, yard, driveway, I keep looking neat by removing deadfall and dead lower branches, but just on the edges. Quick work, and improves the appearance enormously while leaving the interior untouched.

If you have large swaths that need clearing, at least consider hiring it out. I chose one area approx 1/8 acre at the bottom of the ravine closest to the house to be cleared so some ponds could be dug and you could stroll around and enjoy it (project #1, year #1). This area was completely cleared, regraded, replanted, re-landscaped, etc., etc. This was a big, fairly dangerous job that made sense for me to hire out, including an extra man to buck everything; all done in a matter of hours. That's the downside of the "push it all down" method; it's a lot of work to restore to looking semi-natural, if you care about that, and that was my job.

When using the push-over method for just one or two trees, I like to rake up the duff first and set it aside; then once the tree is gone, fill & level the hole then rake the duff back over the area. Prevents erosion and looks natural.

Big stumps should be hauled away IMO unless you don't mind dumping them somewhere on your property and they don't seem to rot very fast (5 years later, still intact). They will not burn (surprise) we had huge bonfires hot enough to smelt iron and they just will not burn, at least not when fresh. And will ruin your chain fast; very dense stuff and often surprisingly contain rocks that the tree grew around, and bits of old barb wire fence too. Ugh. $90 per load to have them hauled away; best money I ever spent.

Can't say it enough: tree-work is sooo much easier late-fall through late-winter, for so many reasons..... You can see better, no underbrush to snag, no poison ivy or bugs, the critters are hibernating, a bonfire is welcome in winter--hellish in summer, and I swear a young tree is half the weight leafless.

(Before everyone kills me, remember I'm talking about minimally invasive methods in hilly, dense forest.)
 
   / Thinning forest #12  
I have a unit just like that - Stihl F350. Works well on little trees up to about 2". Beyond that - it becomes a problem. I've tried mine a couple times and have gone back to my small Stihl with its 14" bar. Too much farking around with the F350.

What I like about the brush saw is that you aren't bending over all of the time. I used to thin an acre a day with one years ago... When I was younger and much more limber than I am now.
 
   / Thinning forest #13  
Jstpssng - when I use the F350 - I have a harness that I put on. The harness plus standing sure does help the sore back. That's why I got the little Stihl with the 14" bar. Its so light and quick. The VERY WORSE part in all of the thinning is - dragging the dang felled trees out and into a pile. A Ponderosa pine that's 6" on the butt and 32' long is no little thing. I trip and fall, slip and fall - at least half a dozen time during the morning activity. I've tried limbing the little pines and cutting them in half. All that does is double the work and its hard getting a pine to go into a chipper when its cut in half. They go in so easy - "in the round". The bottom two or three feet are limbless and its a good start for the chipper.
 
   / Thinning forest #14  
I agree with the advice to get advice on what to thin from your extension agent.

If you're going to chip the small trees you cut you won't want to run the root balls through the chipper. They have dirt and rocks that will dull the knives. I'd cut them as low as you can so you can chip them. That's what I do with mine. Can't burn here so I chip a lot.

When I was on a thinning crew in the high forests of Arizona we used large chainsaws with bow bars and guards. You cut with the end of the blade not near the powerhead like with a regular bar. So there's a lot less bending over. Can't find those type of bars now, so for thinning I use a lightweight saw with a relatively long bar, bend over and cut with the end of the bar. I'm in pretty good shape so it's not a problem. I find that dragging trees out of the way, to the chipper and putting them in is more work than the cutting.

I have an FS250 brush cutter too but I use the chainsaw for most brush cutting. The problem with the brush cutter is that you can't pick up something that's in your way without first taking the saw off the harness. Most of my brush is so thick that I have to alternate cutting and dragging/piling in order to make any headway. If you can cut and leave them where they fall the brush cutter can work. You can buy a brush cutting blade for your FS90. I also use a small guard- the large string trimmer one gets in the way when you're using a blade. I had to special order it from my stihl dealer and they really did not want to sell it to me.
 
   / Thinning forest #15  
Would a tree shear work for this? Seems like they could cut at ground level without damage, unlike a saw. I've never used a shear, but nobody else has mentioned it.
 
   / Thinning forest
  • Thread Starter
#16  
Maybe.... The SSL-mounted shears seem a bit pricey, though. We just spent a good chunk on the tractor, chipper, grapple, etc..., so I was hoping to keep any additional large purchases to a minimum. That being said, I was looking at the puller from Titan earlier... ;D

The designs of the pullers and shears are very similar... I wonder why the big price discrepancy?

I'll probably start w/ the saw blade for the FS90 and see how that works. Seems like a cheap and potentially effective option. The woods aren't that thick or rough that I wouldn't be able to just drive the tractor in so I would have the chipper near where I need it and chip in place rather than trying to drag cut trees out.
 
   / Thinning forest #17  
Jstpssng - when I use the F350 - I have a harness that I put on. The harness plus standing sure does help the sore back. That's why I got the little Stihl with the 14" bar. Its so light and quick. The VERY WORSE part in all of the thinning is - dragging the dang felled trees out and into a pile. A Ponderosa pine that's 6" on the butt and 32' long is no little thing. I trip and fall, slip and fall - at least half a dozen time during the morning activity. I've tried limbing the little pines and cutting them in half. All that does is double the work and its hard getting a pine to go into a chipper when its cut in half. They go in so easy - "in the round". The bottom two or three feet are limbless and its a good start for the chipper.
You're talking about a much bigger tree than I am... and I have a winch to pull out trees the size that you are dragging.
 
   / Thinning forest #18  
Jstpssng - I've though of a winch or just a tow line. But it would take so much longer. Its just a lot quicker to drag them out by hand and then later ***** about it. Actually - hand dragging is about the only way it can be done. So many fallen trees mixed in with so few still standing. And the fallen ones are lying halter/skelter, all over and all over each other.

When I thin a stand - there is usually 100, maybe 150, small trees. Growing so close together - its difficult to even squeeze between them. I will cut a path right thru the center - first thing. Then work in all directions off that first path. When I'm done there will be, maybe ten, left standing. Hopefully - the best of the lot.

Two things raise havoc with all pines locally. The most devastating is pine bark beetle. I loose around half a dozen to a dozen trees each year to the beetle. The other is porcupines. For whatever reason - I've not seen a single one around here in over ten years. And it can't be that I've killed them all. I do my best but that only in the day time. Some natural factor is keeping them away.
 
   / Thinning forest #19  
The more you thin, the more small crap will grow
 
   / Thinning forest #20  
Hmmm - buckeyefarmer - that's sure not the way it works in the pine forests around here. You thin and what remains grows big and strong. Otherwise, you end up with stands of spaghetti with green tops.
 

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