Assertion: legume inoculation | /r/HasAspect | strong impact
Facets:
value: at the system level
type: LOCATION
value: in fields
type: LOCATION
Source sentences:
text: Legume inoculation had a strong impact at the system level, especially in fields that vetch or field pea was not previously cultivated, reducing the economic optimal nitrogen fertilizer rate in the succeeding maize.