Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic Sanctuary of Machu Picchu' has mentioned 'Irrigation' in the following places:
Occurrence Sentence Text Source
Because of the large amount of rainfall at Machu Picchu, it was found that irrigation was not needed for the terraces.
Sophisticated channeling systems provided irrigation for the fields.
[62] Multiple canals and reserves throughout the city provided water that could be supplied to the terraces for irrigation and to prevent erosion and flooding.
Numerous subsidiary centres, an extensive road and trail system, irrigation canals and agricultural terraces bear witness to longstanding, often on-going human use.