Rocks happen. And they continue to breed. We have a couple of fields on the back of our farm in Alabama that have been under continuous cultivation since the 1920's, and we STILL drag up rocks from bowling ball size to almost half-a-refrigerator size. And we've been no-tilling that ground for decades.
Right after we got our first tractors with cab and A/C (a pair of 1976 IH 966 Turbo's), I was chisel plowing one of those fields and ripping right along in the 104 degree August heat with the A/C wide open and blowing snowballs. I wasn't paying close enough attention and was enjoying all that horsepower and I let the plow get a little deep.
I snagged a large microwave oven sized rock and up it came, jammed right between two of the chisel arms. Danggit!!! I jumped out of that cab and grabbed a big prybar and started to work. I dang near passed out. Coming out of that icebox cab into that 104 degree heat (even higher in the sun out in that field) nearly killed me.
By the time I got that small boulder pried out of my plow, I was about to fall out from heat exhaustion. Never had that problem when I was sitting out in the heat already................................. But I would still never give up that cab for row crop work.