Distribution
Brazil, W. Indies, tropical Africa, South India, forested warm temperate and tropical regions. These regions have alternate wet and dry period, and hot humid conditions.
Characteristics
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1. Extreme form of red tropical soil type.
2. Leached of alkalis and silica.
3. Accumulation of sesquioxides in top layer.
4. Crust formation near the surface, nodular concretions, induration
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5. When dry it becomes hard and thus forms a useful building material.
6. Soil reaction is acidic.
7. Poor base saturation.