Total number of master horizons present in soil are

Solution(By Examveda Team)

The total number of master horizons present in the soil is 5. These are the O horizon, A horizon, B horizon, C horizon and E horizon.
A soil horizon is a layer parallel to the soil surface whose physical, chemical and biological characteristics differ from the layers above and beneath.
O horizon is soil layers with a high percentage of organic matter.
A horizon is a mineral horizon formed at the soil surface, or below an O horizon.
B horizon is a subsurface soil layer that is immediately beneath the A horizon from which it obtains organic matter chiefly by illuviation and is usually distinguished by less weathering.
C horizon is the soil layer lying beneath the B horizon and consisting of the more or less weathered parent rock.
E horizon has a lower clay content.