SILK HOPE — They call it crop mobbing. Think of it as a Digital Age barn raising, or Facebook-enabled farming.

About once a month, a growing contingent of farmers, food activists, office workers and the unemployed chooses a small farm somewhere around the Triangle and puts a serious dent in the owner’s to-do list.

More than 50 volunteers showed up Sunday morning at Okfuskee Farm, near the northwest Chatham County community of Silk Hope, then spent the day building planting beds, moving mulch and hauling timber.

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