CHAPTER FOURDesign for the Other 90 Percent

WHEN BAHADUR’S FAMILY, WITH THE HELP OF HELVETAS, gained access to a half-inch pipe full of water coming to their house, they saw right away that they could use it to water a few vegetables. They just held the pipe and let the water fall onto the plants. But they couldn’t figure out how to use it to irrigate a whole field of vegetables. Of course, they had never heard of drip irrigation, and even if they had, the smallest available drip system would have cost two thousand dollars, far more than Bahadur’s family could afford.

A world-class irrigation expert like Jack Keller probably could have given them three practical solutions to their problem in ten minutes, but there were no Jack Kellers available. ...

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