Ok, it was a cheap subsoiler with the front edge sharpened somewhat. Toplink adjusted for minimum point angle to get penetration. Existing
roots were 3-4" deep, first hardpan was 4-6, tried to run the subsoiler at 6-7, but it pulled deeper when the it got really hard (actually squatted the tires). Done late winter/early spring after a dry winter, driest that area was all year, but still not as dry as other areas I have done in late summer. Rains came about a month later. Those are about 3-4 foot spacing, as close as I could get without driving on the last fracture zone. Drove a slow to medium walking pace, as slow as I could and keep moment to get through the small tree roots.
It seems to have solved the bog problem that area has in wet weather and did grow soil, I just want to grow MORE.
"You must be the change you want to see in the world." "First they ignore you, then they laugh at you, then they fight you, then you win." --Mahatma Gandhi
"Preach the Gospel always, and if necessary, use words." --Francis of Assisi.
"Family farms work when the whole family works the farm." -- Adam Klaus