Which of the following erosion is characterized by the presence of finger-like structures?

Correct option is B

Rill erosion forms finger-like channels on the soil surface due to water flow.
· When runoff starts, channelization begins and erosion is no longer uniform.
· Rills are shallow drainage lines < 30 cm deep.
· Can be removed by normal tillage operation.
(a) Gully erosion
· Gullies are channels deeper than 30 cm.
· They can be spectacular to look at but over time actually lose less soil than sheet and rill erosion.
· Can not be removed by normal tillage operation.
(c) Splash Erosion
· First stage of water erosion.
· It occurs when raindrops hit bare soil.
· A raindrop is approximately 5 mm in diameter and hits the soil at a velocity of 32 km/hr.
· Raindrops behave like tiny bombs when falling on exposed soil so that individual soil particles are "splashed" onto the soil surface.
(d) Sheet erosion
· The detachment and transportation of soil particles by flowing rainwater are called sheet or wash-off erosion.
· Results in the loss of the finest soil particles that contain most of the nutrients and organic matter.
· It is unnoticed by farmers and hence a most serious form of water erosion.