Managing irrigation and nutrients for grapes can be tricky anytime — even more so in a drought year like the one last year in Washington. The key to ensuring vineyards receive the necessary water and nutrients lies underground at the roots.For two years, Washington State University soil scientist Joan Davenport and a research team sampled Concord roots on 42-year-old vines atdifferent points in the growing season to better understand when roots are working most actively to support the vine. While Davenport focused on Concord grapes for the study, the findings relate to wine grapes as well.
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