256 DRY-FARMING 
to be profitable and will then be brought into the 
commercial scheme of dry-farming. \ 
Meanwhile, the crop problems of dry-farming de- 
mand that much careful work be done in the im- 
mediate future by the agencies having such work in 
charge. The best varieties of crops already in prof- 
itable use need to be determined. More new plants 
from all parts of the world need to be brought to this 
new dry-farm territory and tried out. Many of the 
native plants need examination with a view to their 
economic use. Jor instance, the sego lily bulbs, upon 
which the Utah pioneers subsisted for several seasons 
of famine, may possibly be made a cultivated crop. 
Finally, it remains to be said that it is doubtful wis- 
dom to attempt to grow the more intensive crops on 
dry-farms. Irrigation and dry-farming will always 
go together. They are supplementary systems of 
agriculture in arid and semiarid regions. On the 
irrigated lands should be grown the crops that require 
much labor per acre and that in return yield largely 
per acre. New crops and varieties should besought 
for the irrigated farms. On the dry-farms should be 
grown the crops that can be handled in a large way - 
and at a small cost per acre, and that: yield only 
moderate acre returns. By such codperation between ° 
irrigation and dry-farming will the regions of the 
world with a scanty rainfall become the healthiest, 
wealthiest, happiest, and most populous on earth. 
