166 ARID AGRICULTURE. 



dry uplands. There are many places, however, 

 where winter rye succeeds without irrigation. If 

 planted early in September, winter rye will pro- 

 duce considerable winter and early spring pas- 

 ture, and the early rains supply moisture enough 

 to mature a crop of grain. Several of the native 

 grasses, notably the Western Wheat-Grass, can 



Plate XXVI. A Field of Awnless Brome Grass. 



Dry Grown. Photo by Stimson. 



be greatly increased in unirrigated meadows by 

 seeding and harrowing. Under irrigation, even 

 though there may be only water enough for win- 

 ter flooding, or a single irrigation in the summer 

 season, the number of pasture grasses from 

 which to choose is much larger. In mountain 

 meadows, or where there is abundance of water, 



