soil moisture deficit

English

Noun

soil moisture deficit (countable and uncountable, plural soil moisture deficits)

  1. The amount of water needed to bring the soil back to full capacity. The deficit occurs in periods of prolonged drought in areas that usually have normal rainfall.
    Synonym: SMD
    • 2025 November 12, “West of England services respite”, in RAIL, number 1048, page 17:
      Network Rail said this has been due to the driest ever spring and summer, which caused clay embankments to shrink unevenly in a process called soil moisture deficit.
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