Assertion: grassland's soil | /r/HasAspect | nutrient-rich upper layer
Facets:
Source sentences:
text: The soil of temperate grasslands has a nutrient-rich upper layer, but fires that prevent trees and shrubs from growing often accompany seasonal droughts.
text: The soil of temperate grasslands has a nutrient-rich upper layer, but fires that prevent trees and shrubs from growing often accompany seasonal droughts.