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Mineral Rich. The richest of Ag. Soil. Moderate to low rainfall. Found in the A horizon. Grasslands, Pacific northwest. 25% of US soil
Deep strongly weathered red soils. Iron Oxide. Snot suitable for ag.
Acidic soils, Cool moist areas. Coniferous forest. Not good for agriculture. Less than 5% of the US
Stongly leached, acidic soil. Low native fertility. 8% of the earths surface.
Clay rich soil. Poor drainage. Fertile but difficult to till.
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