Assertion: manure's material | /r/AtLocation | manure
Facets:
value: to produce more biogas
type: PURPOSE
Source sentences:
text: They may also want to know if another material can be added to manure to produce more biogas from the digester.
text: No other materials are added to the manure to create the final nutrient-rich compost product.
text: Therefore, other material with high carbon content, such as crop residues, wood chips or sawdust, should be added to manure.