Assertion: fertilizer's use | /r/HasProperty | cow manure
Facets:
Source sentences:
text: The study compared the use of using chicken manure only, cow manure only, 16-20-0 fertilizer only, a mixture of cow manure and 16-20-0 fertilizer, a mixture of chicken manure and 16-20-0 fertilizer, and a control group that used no fertilizer.