Do you even have a clue what it costs to feed those Oxen the year around? Vet bills, etc,. Your “organic” approach will also cut crop yields in half. It will take at least 20 acres to produce pasture and feed for those Oxen, which will never be used as income to the farm.
More importantly, your “method” was how all farming was previously done. If it was as economical and effective as you claim, then it would still be exclusively used by all farmers.
Your continued argument is pointless as well as ignorant.
It doesn't hurt to think about these things as the cost of fuel could become prohibitively expensive. At some price hitching the plow to old Nelly makes sense. I find the discussion worth having, since our energy policy is insane and getting crazier by the day.