Morgen
Symbol: Mg
A morgen was a unit of measurement of land in Germany, the Netherlands and the Dutch colonies, including South Africa and Taiwan. The size of a morgen varies from 1/2 to 2 1/2 acres, which equals approximately 0.202 to 1.012 ha. It was also used in old Prussia, on the Balkans, Norway and Denmark, where it was equal to about two-thirds of an acre (0.27 ha).
The word is usually taken to be the same as the German and Dutch word for "morning". Similarly to the Imperial acre, it was approximately the amount of land tillable by one man behind an ox in the morning hours of a day.
Today one morgen is defined as a quater of a hectare which means 2,500m2.