+A polder is a low-lying tract of [Land](/wiki/Land) reclaimed from [Water](/wiki/Water). Enclosed by dikes, its internal water level is meticulously controlled, transforming marsh or sea into fertile ground.
+## See also
+- [Dike](/wiki/Dike)
+- [Reclamation](/wiki/Reclamation)
+- [Wetland](/wiki/Wetland)
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