California researchers map soil water content using data generated from high-frequency radar systems. BETWEEN the rows of ripen-ing grapes at the Robert Mondavi Vineyard in Napa Valley, a University of California (UC)-Berkeley researcher pushes a wheelbarrow outfitted with a ground-penetrating radar device. The field trip is part of a project that combines time-tested agricultural methods with high-technology geophysics to improve the quality of Northern California's finest wines.
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