There is some iron ore in the eastern and south-eastern parts of the state, and the mining of it was begun early in the 19th century; but the output decreased from 254,294 long tons in 1889 to only 26,585 long tons (all carbonate) in 1908.
The universal attack that has been made upon this pest has, however, largely decreased its numbers.
The average size of the farms decreased from 125.2 acres in 1850 to 99.2 acres in 1880 and 88.5 acres in 1900.
The barley crop decreased from 1,715,221 bushels in 1870 to 1,053,240 bushels in 1899 and 829,000 bushels in 1909.
The trade of Greenland has on the whole much decreased in modern times, and trading and missions cost the Danish state a comparatively large sum (about £i i,000 every year), although this is partly covered by the income from the royalty of the cryolite mines at Ivigtut.