Question

what is Indigo crop​

Answer 1

Indigofera tinctoria, also called true indigo, is a species of plant from the bean family that was one of the original sources of indigo dye.

Answer 2

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explanation....

indigo was a natural dye extracted from the leaves of certain plants, and this process was important economically because blue dyes were once rare. A large percentage of indigo dye produced today, several thousand tonnes each year, is synthetic. It is the blue often associated with denim cloth and blue jeans.

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