The biological drainage (bio-drainage) technique for reclaiming waterlogged and saline agricultural lands utilizes:
Options:
(A) Deep-rooted, high-transpiration vegetation (such as Eucalyptus trees) to lower water table levels
(B) Genetically modified earthworms to burrow horizontal drainage paths
(C) Bacterial inoculation to dissolve soil clay particles
(D) Algal mats to cover the water surface
Answer Key:
A
Step-by-Step Solution & Explanation
Bio-drainage involves planting fast-growing, deep-rooted phreatophytic trees (e.g. *Eucalyptus tereticornis*, *Casuarina*) that transpire tremendous volumes of subsurface groundwater through solar energy, thereby lowering saline water tables without producing disposal effluents.