Crops native to Africa are not the staples of the world.
Provided with transport facilities, which renders its cities the principal distributing centres both for the entire Northwest for coal shipped via the Great Lakes, and also for the eastern and middle Western states for the great staples, wheat and lumber, derived either from Minnesota itself or by means of its great transcontinental railways from the neighbouring Northwestern states and Canadian provinces.
During the 19th century the opening of a railway system in East Prussia and Russia gave a new impetus to its commerce, making it the principal outlet for the Russian staples - grain, seeds, flax and hemp. It has now regular steam communication with Memel, Stettin, Kiel, Amsterdam and Hull.
The great bulk of the yarn spun in Great Britain ranges between comparatively narrow limits of count, and such staples as 32' to 36 s twist and 36' to 46' weft in American, 50 9 to 60 s twist and 42' to 62' weft in Egyptian, make up a large part of the total.
The dhootie is one of the principal staples for India and is exported both white and grey.