This is an automatic system controlled by an Arduino 101 that improves plant quality in our modern, urban society.
Project tutorial by James Yu
In theory, this project would be able to work on a larger scale; the diagram in this project shows a single unit implementation, though, so in order to allow this kind of a system to work with larger plantations, a method of routing the water (perhaps gravity-based branch-out flow) or duplication of watering units may be required. Also note that adding additional servos will consume more power and that there is a maximum number of servos supported by the operational library under this setup. For larger settings, a larger reservoir of water may or may not also be necessary (depends on your needs and the setup).
These were just sensors that I was able to acquire on-hand; obviously sensors like the one you mentioned would be much more favorable for a cheaper, longer-lasting solution.
Perhaps a data array?
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