Question

when water is singly how did they drain it out?
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Answer 1

Answer:

just the same they used to drain before

Answer 2

Explanation:

Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area with excess of water. The internal drainage of most agricultural soils is good enough to prevent severe waterlogging (anaerobic conditions that harm root growth), but many soils need artificial drainage to improve production or to manage water supplies.