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Here’s the
progression of innovation in irrigation technology from spray, to low energy
precision
application, to drip irrigation to subsurface drip irrigation. The question
we’re asking in arid Saudi Arabia is can we use the sun to power enough
desalination to support enough desalination to grow crops in the desert.
Saudi Arabia’s problems aren’t much different from those of our arid
southwest. In many places, agriculture is living on borrowed time: Saudi
Arabia’s aquifers and our huge Ogallala aquifer are being drained -- and
are not being recharged – that’s the definition of a fossil aquifer.
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