The general export of yarn varies according to influences such as tariff charges, spinning and manufacturing development in the importing countries and the price of cotton.
Barley was formerly grown for export to the United States for malting purposes.
The chief export from the group is wool, grown upon runs farmed both by Europeans and Morioris.
The chief centres of export are Adrianople (more than half), Constantinople and Smyrna, the others being Brusa, Beirut, Ismid, Mytilene and Salonica.
The alpaca is highly prized for its fine wool, which is a staple export from Bolivia, but the animal is reared with difficulty and the product cannot be largely increased.
A considerable export trade in copper, tin and granite was formerly carried on, and the last is still exported, hut the chief trade is in grain; while timber, coal and limestone are imported.
A branch railway to Calafat facilitates the export trade with Bulgaria.
The growth of the industry is shown in the export returns, which were 171,891 bunches for 1892, and 1,397,388 bunches for 1906, the area under cultivation being about 7000 acres in the last-mentioned year.
Manganese ore is the chief mineral, and is extracted for export to the extent of 160,000 to 180,000 tons annually, besides coal, lead and silver ores, copper, naphtha, some gold, lithographic stone and marble.
Of all the countries represented - Germany, Austria-Hungary, Belgium, Spain, France, Great Britain, the Netherlands, Russia and Sweden - only one, namely France, was opposed to the complete suppression of all export bounties, direct or indirect; and Russia declined to discuss the question of her internal legislation, contending that her system did not amount to a bounty on exportation.