Assertion: birch | /r/HasProperty | watered
Facets:
value: because of the shallow root system
type: CAUSE
value: often
type: TEMPORAL
value: during dry periods
type: TEMPORAL
Source sentences:
text: Though so often planted in full sun in areas such as parking strips that typically have poor soil and no irrigation, birches prefer some shade, must be watered during dry periods and should be mulched to keep their shallow root system cool.
text: Birch trees usually need to be watered often because of the shallow root system.