different between udert vs vertisol

English

udert (plural uderts)

(soil science) A vertisol with cracks that are open for less than 90 cumulative days per year and less than 60 consecutive days during the summer. In some areas, cracks open only in drought years.

vertisol (plural vertisols)

(soil science) A clay soil, containing a high content of montmorillonite, that forms deep cracks in drier conditions.

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