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Farmers in 14 states have planted more than 14,000 acres of prairie strips to ease soil erosion. On this episode, Lisa Schulte Moore of Iowa State University explains the science behind planting native grasses and plants. \u201cPrairie strips are oriented perpendicular to that flow of water,\u201d she says. \u201cIt's really about slowing that water down, allowing it to infiltrate.\u201d