SUGAR BEETS, POTATOES, ETC. 



305 



FIG. 82. Irrigated pumpkins. 



182. Fiber crops. The strength of irrigation agricul- 

 ture will increase as the crops grown are related to manu- 

 facturing industries. The fiber crops are, therefore, impor- 

 tant. Hemp grows exceedingly well under irrigation; and, 

 from the irrigated crop, fiber of the highest quality has 

 been made. It is always grown in rows and irrigated by 

 furrows. Since it attains great growth it requires consider- 

 able water. Flax is likewise of easy culture under irriga- 

 tion. It must always be irrigated by furrows, since it is 

 subject to sun-scald. It requires little water; in fact, it 

 has been grown on dry-farms with great success. Cotton 

 has been grown under irrigation for more than fifty years, 

 and hi quantities sufficient to supply a cotton-mill, which 

 was established at that time. In more recent days cotton- 

 growing has been established successfully hi the Imperial 

 Valley of California and ffi southern Arizona. It is irri- 

 T 



