Finger-like Structure is formed in which erosion? (IBPS AFO 2020)

✅Explanation: Rill erosion is characterized by the formation of small channels or "rills" on the soil surface. These rills resemble finger-like structures and are formed by the concentrated flow of water.

📌Other Options Explanations:
-Option A: Sheet Erosion – Sheet erosion involves the uniform removal of a thin layer of soil from a large area. It doesn't create the concentrated channels seen in rill erosion.
-Option C: Gully Erosion – Gully erosion is a more severe form of erosion where the rills become larger and deeper, forming gullies. These are much larger than the finger-like structures of rill erosion.
-Option D: Splash Erosion – Splash erosion is the initial stage of erosion where raindrops impact the soil surface, dislodging soil particles. This doesn't directly form the finger-like rills.

🔴Additional information:

✏️ Rill erosion:
-When runoff starts, channelization begins and erosion is no longer uniform.
-Rills are shallow drainage lines < 30 cm deep.
-The rills are usually removed with farm machinery.
 

✏️Gully erosion:
– It is an advance stage of Rill erosion.
-Gullies are channels deeper than 30 cm that can not be removed by normal cultivations.
-They can be spectacular to look at but over time actually lose less soil than sheet and rill erosion.

• Size of gullies:
-G1: Very small
-G2: Small
-G3: Medium
-G4: Deep and Narrow