I do the same thing before I plant all my tree rows. I was told you want to subsoil in the fall, in the spring you will slice the hardpan, but not break it up.
In the fall you can watch the ground "errupt" as it shatters the hardpan. The the water gets down and freezes through the winter breaking it up even more.
Now I am just a rookie, someone else could explain it better I am sure.
Now for HP. I run my 3930 4wd with one shank at 20 inches and it is crying the whole way. I bought a 9 shank, left 3 on and pull it with AC7000 (105HP) does much better.
I think your 1640 might be huffing just a bit like my 3930 does. I leave my loader on, rear tires are loaded, no traction problems. When that tooth really bites it will stop the tractor like I just threw an anchor out.
Hopefully ripper is spring loaded or shear pinned. I have hooked 2 rocks that I am amazed didn't bust something on the tractor or the ripper.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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