Gosia Wozniacka and Terence Chea
Seattle Times
July 15, 2013

On a windy morning in California’s Salinas Valley, a tractor pulled a wheeled, metal contraption over rows of budding iceberg lettuce plants. Engineers from Silicon Valley tinkered with the software on a laptop to ensure the machine was eliminating the right leafy buds.

The engineers were testing the Lettuce Bot, a machine that can “thin” a field of lettuce in the time it takes about 20 workers to do the job by hand.

The thinner is part of a new generation of machines that target the last frontier of agricultural mechanization – fruits and vegetables destined for the fresh market, not processing, which have thus far resisted mechanization because they’re sensitive to bruising.


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