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A Naturalist at the Washington County Conservation Center says much of what Iowa is famous for can be credited to what’s under our feet. Pam Holz says soil that makes for rich farming is also ideal for wetlands. Holz says that’s because it contains a high percentage of clay, which holds water very well. She says this is why farmers often need to till their fields. On the other hand, she says it’s not ideal for septic tanks. She says they need to be above the water table.
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