Red soil develops a reddish colour due to the [[1]] in crystalline and metamorphic rocks.

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Detailed Solution

Red soil develops a reddish colour due to the diffusion of iron in crystalline and metamorphic rocks. The iron oxide in the rocks is what gives the soil its red colour. Red soil's high quantities of organic matter and nutrients are what give it its fertility. Red soil has good drainage, which is crucial for farming. There are many distinct kinds of soil, and each has specific qualities. The colour of the soil can be used to categorise it.

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