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Changing concepts in soil classification. The structure of

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SET #6<br />

Red and yellow <strong>soil</strong>s <strong>of</strong> wet tropical and subtropical<br />

regions.<br />

PLINTHOSOLS on old weather<strong>in</strong>g surfaces with ‘pl<strong>in</strong>thite’<br />

deeply weathered FERRALSOLS that have a very low cation<br />

exchange capacity<br />

ALISOLS with high cation exchange capacity and much<br />

exchangeable alum<strong>in</strong>ium,<br />

deep NITISOLS <strong>in</strong> relatively rich parent material<br />

strongly leached, red and yell ow ACRISOLS on acid parent<br />

rock<br />

LIXISOLS with a low cation exchange capacity but high<br />

base saturation percentage.

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