Which of the following beneficial agronomic outcomes result from effective subsurface drainage of waterlogged agricultural land?
Options:
(A) Promotes deeper root penetration and root respiration by expanding the aerobic soil zone
(B) Enhances soil warming in early spring due to lower heat capacity of drained soil compared to water
(C) Facilitates leaching and removal of soluble toxic salts from the root zone
(D) Permanently prevents transpiration from crop canopies
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
1. Aeration allows root respiration and deeper root growth (A is true).
2. Water has high specific heat; removing excess water warms soil faster, advancing seed germination (B is true).
3. Deep percolation flushes salinity below the active rhizosphere (C is true).
4. Drainage sustains healthy vegetative growth and transpiration; it does not stop transpiration (D is false).