<font color="blue"> You guys in the NW kill me. I am thinking of planting blackberries....you guys are ripping them out. </font>
We don't just have "blackberries" in the NW. We have HIMALAYAN BLACKBERRIES. These are extremely invasive, non-native, and BIG. The canes get to be about as big around as my wrist, and 20 to 30 feet long. The thorns are up to a half inch long, and can pierce right through leather gloves. Sometimes they grow 20 or 30 feet up a tree, and then send down a curtain of vines that catch you as you are out mowing. If you park a vehicle or implement near the edge of the woods, it can be completely covered with vines in less than a season. The berries make OK pie or jam, but are best as jelly because they have a high seed/pulp ratio. Not as good as regular native blackberries.
I borrowed my grandpa's Kubota L345DT, and had great success attacking them with the FEL and a brush hog. Most of the patches that remain are on slopes too great for most CUTs, so I am using the brushcutter. It's a lot of work, even though I have a big Shindaiwa cutter with a 10" blade. And the stinging nettles hiding in the brush don't help either.
I recommend the FEL, a brush hog, and of course a
chipper/shredder (not just a
chipper) for getting rid of the remains. I have some neighbors who say the best is to cut them in the fall, and spray them at that time. I have other neighbors who had pretty good success by cutting, and then covering the ground with a tarp for a year.
Oh, and I spent a summer in South America, visiting the Amazon jungle, and there was NOTHING as dense and treachorous as blackberries in the NW!