Assertion: urea | /r/ObjectUse | used in diet
Facets:
value: for beef cattle
type: TRANSITIVE-OBJECT
value: over the past 35 years
type: TEMPORAL
value: successfully
type: MANNER
Source sentences:
text: Urea has been used successfully in diets for beef cattle over the past 35 years, and review articles covering these studies include those by Krebs (1937), Reid (1953), Lewis (1961), Briggs (1967), Loosli and McDonald (1968), Tillman and Sidhu (1969), and Helmerand Bartley (1971).