Section 4: Soil and Water Conservation Engineering
Soil and Water Erosion
Subtopic: Biological and engineering measures to control erosion
Question Statement:
Which of the following agronomic practices are effective biological measures to control soil erosion on sloping croplands?
Options:
(A) Contour strip cropping
(B) Mulch tillage leaving crop residue on the surface
(C) Cover cropping with dense canopy leguminous crops
(D) Deep ploughing straight up and down the steepest slope direction
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
- A, B, and C protect the soil from direct droplet impact and reduce surface runoff velocity.
- D creates steep channels that severely accelerate rill and gully erosion.