: A traditional Danish unit of land area, originally the area that could be planted with a tønde of seed. The tønde land equals 14 000 square alen, which is about 5516 square meters, 0.5516 hectare, or 1.363 acre
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}