In the 19th century, access to the Californian and Australian markets made wheat export a very lucrative activity. In the mid 19th century, these countries experienced large gold rushes which created a large demand for wheat. Chile was at the time the "only wheat producer of some importance in the Pacific". At the same time as the wheat cycle new irrigation canals were built and apiculture and some machines introduced into Chilean agriculture. Apart from that, new markets were explored for Chilean agricultural products. The wheat boom did not last for long; by 1855 California managed to supply itself with wheat and from 1858 onwards it went over to export wheat to Chile. The Australian gold rush of 1851 had the effect of decreasing the labour used in agriculture forcing the colony to import wheat from Chile sustaining Chilean wheat exports whilst the Californian market vanished. After the gold rushes of California and Australia were over these regions begun exporting wheat competing with Chilean wheat forcing from the mid-1860s onwards wheat exports to be shifted to England. Between 1850 and 1875 the area cultivated with wheat and barley for export in Chile rose from 120 to 450 ha. The "cycle" came to an end in the late 1870s due to the increased technification of agriculture in the United States and Argentina plus the competition of Russia and Canada. The end of the wheat cycle added to the already difficult situation that Chilean economy was passing through in the 1870s.