| http://www.w3.org/ns/prov#value | - It was probably the invention of the wooden plow, some 3,000 years ago, that first led herdsmen to castrate their bulls so the animals would be docile enough to harness for field work.In Mexico, as recently as the late 60's, we saw many oxen in use as plow animals, and there are a fair number in southern Texas and Florida.
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