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In page La Ligua River:

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The development of new water/irrigation technologies and the availability of untilled rain-fed land on the valley sides has led to an boom of fruit plantations aimed at growing export-oriented goods.[1] Well-drilling, pumps, and new irrigation technology became increasingly mass-produced and inexpensive in the 1990s, which has allowed for an increase usage of the La Ligua River and the aquifer that complements it.[1] This allows for the increased popularity of avocado plantations, both by large fruit plantations and peasants alike.