NEET BIOLOGY

Detailed explanation-1: -Poorly drained soils are often dominated by blue-grey colours often with yellow mottling. Well drained soils will usually have bright and uniform colours. Simple colour names can be used but need to be related to a fixed naming system. Chroma, the saturation of the colour.

Detailed explanation-2: -Well or moderately well-drained soils appear brownish, while poorly drained soils appear gray. Somewhat poorly drained soils generally appear gray because they usually have gray clay films, many of which show in the wall of the pit.

Detailed explanation-3: -Poorly drained soils drain so slowly that the soil remains wet for a large portion of the year. These conditions are caused by a high water table or a slowly permeable layer within the soil profile. Very poorly drained soils occur when the water table remains at or near the surface most of the year.

Detailed explanation-4: -Sand. Soils high in sand are light gray to white. Sandy soils are devoid of most minerals that lend color to the soil. Sand has large, coarse particles that do not stick together.