IRRIGATION 37 



reasonably certain. Whether irrigation can be made 

 to take the place of the natural water supply, is still 

 an unsolved problem, at least with us. An oversupply 

 at any time is liable to produce a large proportion 

 of scallions, and the bulbs will be of inferior quality 

 and prove poor keepers. Even in irrigation countries, 

 in no case is it advised to irrigate oftener than once 

 a week. 



