EXPERIMENTS WITH DURUM WHEAT. 
ket, presumably in response to a definite demand. At other termi- 
nals, and especially back at the primary markets, as noted above, 
conditions were much less favorable to this wheat. 
AGRONOMIC ADAPTATION AND PRODUCTION. 
Durum wheat owes its importance in this country to certain char- 
acters which adapt it to the conditions prevailing in parts of the 
spring- wheat belt. 
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Fig. 1.— Diagram showing the prices of No.l Durum wheat and No. 1 Northern wheat at Duluth, Minn., 
on the first day of each month in the 15 years from 1902 to 1916, inclusive. 
ADAPTATION. 
The characters which have given the durum wheats their outstand- 
ing agricultural value are resistance to, or evasion of, drought and 
rust. Some of the factors involved are rapid and vigorous growth, 
fairly early maturity, and some measure of actual resistance to 
drought and the attacks of rust. Under certain climatic conditions 
the combination results in a uniformly higher yield than that of any 
varieties of common wheat. 
The durum varieties certainly tolerate or withstand drought to 
a much greater degree than common wheats. This has given them 
their widespread popularity in the western half of the northern Great 
