Urea is only slightly acidic, it would take mega amounts and years to see a change. Sulfur is quicker, and smaller the granule the quicker the change, till taking 2 or more years to reap the full benefit. What was your ph there Dennis?
It was 8.3 about two years ago. Its down to the mid 7's now. Not bad for wheat.
I do have access to liquid Sulphur, so I put it on with my spray rig.