Virginia Gewin, Civil Eats –  For the last 15 years, Justin Knopf has opted out of tilling the soil on his farm. More recently, his family’s operation—4,500 acres where he farms wheat, corn, soybeans, and sorghum with his dad and his brother in Central Kansas—has also incorporated cover crops, most often mixes including triticale and canola or millet, radishes, flax and sunflowers. 

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