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Good digging, dvx. Crop irrigation is a problem. Firstly because most of the time it concerns unsustainable cultures, often monocultures (corn/maize comes up again, of course). In other words it's part of productivist, industrial agriculture.

Secondly because the water is used in the summer, is sprayed in a fine mist through the air by pivot-type equipment, and a great deal of it evaporates before reaching the ground and roots.

I don't have any numbers or references, so this comes down to anecdote, but I know my maize-growing neighbours calculate evaporation loss per degree of temperature, and programme the pivot to run longer accordingly.

by afew (afew(a in a circle)eurotrib_dot_com) on Tue Jun 12th, 2007 at 01:24:20 AM EST

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