236 DRY-FARMING 
vegetables, sugar beets, and other intensive crops, 
while wheat, corn, and other grains and even much 
of the forage should be grown as extensive crops 
upon the non-irrigated or’ dry-farm lands. It is to 
be hoped that the time is near at hand ,when it will 
be a rarity to see grain grown upon irrigated soil, pro- 
viding the climatic conditions permit the raising of 
more extensive crops. 
In view of the present and future greatness of the 
wheat crop on semiarid lands, it is very important 
to secure the varieties that will best meet the varying 
dry-farm conditions. Much has been done to this 
end, but more needs to be done. Our knowledge of 
the best wheats is still fragmentary. This is even 
more true of other dry-farm crops. According to 
Jardine, the dry-farm wheats grown at present in the 
United States may be classified as follows: — 
I. Hard spring wheats: 
(a) Common 
(b) Durum 
II. Winter wheats: 
(a) Hard wheats (Crimean) 
(b) Semihard wheats (Intermountain) 
(c) Soft wheats (Pacific) 
The common varieties of hard spring wheats are 
grown principally in districts where winter wheats 
have not as yet been successful; that is, in the 
Dakotas, northwestern Nebraska, and other localities 
with long winters and periods of alternate thawing 
