"Soil type CA" sounds like it is an abbreviation for a soil type on a soil map. You will have to consult that soil map or the soil map's makers to find the answer to that question.

If "soil type CA" did not come from a soil map, you will need to consult the source. There is no universally recognized soil type named "CA."

On the Indian map shown alluvial soil where it is found

A topographic map defines about the soil of that region. It defines the soil fertility, soil quality and what type of landform is there. It is important for agriculture.

Soil type "FeD" is the abbreviation for a soil map unit, and it is specific to the soil map/survey. That is, more than one soil survey might have labeled a map unit "FeD," and each soil survey might use that abbreviation to represent a completely different soil.

Look in the soil survey book where you found FeD. If you found this on the USDA's Web Soil Survey, the soil name should have been supplied in the legend.

Soil sampling