Knowledge: Some regions in Africa, such as the Ethiopian Highlands and parts of Kenya, have a dark color soil that is suitable for agriculture. Also, many crops, including cereals, pulses, oilseeds, and fruits, can be cultivated in red soil.

Conversation:
red is one of the best colors
Interesting, is it because its on the end of the visible light spectrum?
yes, and really plainly it is pretty awesome, and does have meaning behind it
I'm not aware of the meanings, yet I know that during the Renaissance, the rich and nobles had brilliant red costumes dyed with kermes as well as cochineal.
I wonder if there is a significant meaning today?
I can't say, but ever hear of the Rayleigh scattering? It's what causes the red sky during sunset.
Is there a soil of red color?

Response: Yes, many crops, including cereals, pulses, oilseeds, and fruits, can be cultivated in red soil.