THE WORLD'S WHEAT TRADE 67 



Minimum; Maximum. 



Russia — 



7,600,000 1907-08 28,800,000 1910-11 

 Balkan States — 



2,900,000 1907-08 10,900,000 1910-11 

 India — 



2,700,000 1907-08 6,900,000 1910-11 



Argentine and Uruguay — 



7,348,000 1909-10 16,300,000 1907-08 



That these variations are in the main due to 

 seasonal differences appears when the yield per 

 acre, read in conjunction with the acreage 

 under wheat, are examined. 



The supremacy of the United States as an 

 exporter of wheat up to 1903 has already been 

 referred to. From 1886 to 1896 the exports in 

 one year only fell below n million quarters, 

 averaging for the period 1886-1896 nearly 

 18,000,000 quarters, and from 1897 to 1902 the 

 average was as high as 26,660,000 quarters, — 

 during the second period approximately 55 per 

 cent, of the world's total annual exports. The 

 gap in the world's supplies caused by America's 

 smaller exports has principally been made up 

 by the larger output of Canada and Argentina. 

 A comparison of the variations in yield per acre 

 in these countries with that of the United States, 

 clearly shows that they are less reliable sources 

 of supply, for, though the yield per acre in the 

 United States is a low one, it has kept very steady 



