Awesome. I applied compost my first and maybe second year, since then its been mulch and chickens rotating victory garden style.
Last year I seeded with daikon and let it rot.
Still no roots like that yet though.
Discussion
That one may have been a bit of an outlier but I've been seeing 12-16" before hitting 150 psi when testing with the soil penetrometer in that bed.
Penetrometer? I dont even know what that is!
You doin' dat science!