Which one of the following is an organic soil?

🔑Key Points:
-Histosols is a soil with a deep surface layer of pure organic materials.
-Hystosol is made under climatic conditions under peat bogs and specific conditions of the marsh.
-It contains tissue of dead plants and animals and their decomposition products resulting in soil of high organic materials.

🔴Additional Information:
Aridisols (desert soil)
-The largest single soil sequence occurs in dry regions of the world.
-Yellow and light near the surface, decrease in moisture.
-Decreased organic matter.
Oxisols
-These soils develop into the hot and humid climate of the equatorial region.
-These soils are called oxycol because they have a specific horizon with a mixture of iron and aluminum oxide.
-The respective vegetation is the magnificent and diverse tropical and equatorial rainfall forest.
Vertisols
-Made of more than 30 percent clay.
-When wet, vertisol clay is black and becomes hard of iron when dry.
-When dry, the vertisol cracks and cracks wide and the soil dries.
-The regur soil of India is an example of vertisols.