Assertion: plow | /r/HasProperty | ineffective
Facets:
Source sentences:
text: Likely built from modified hand tools, the plows were so light and ineffective that they are now referred to as "scratch plows" for their inability to dig deep into the ground.
text: It was such an efficient tool that there wasn't much difference between the first plows that turned the sandy Mesopotamian soil and those used in medieval Europe thousands of years later, save the addition of a moldboard behind the blade to turn the soil once it was broken.