EXPENSE OF IRRIGATION 



23 



are fully as durable. By puddling the bottoms and sides see- 

 page can be prevented as well as by cementing, and the cost is 

 far less. These reservoirs should be on the highest spot so that 

 a slight fall may be secured from it to all parts of the grounds. 

 The cost necessarily varies in each instance ; therefore I will 

 not attempt to give detailed expenses of reservoirs. 



Fig. 8. Irrigating Celery; Two-Thirds Grown. 



The cost of conveyance of the water from the reservoir to the 

 ground will vary as to the distance the water is to be carried as 

 well as the method of conveyance. If through open ditches the 

 expense is simply in the amount of labor, which is only that 

 employed in making the main ditch. This should be built 

 with the sides thrown up so as to bring the bottom on a level 

 with, or a little above, the surface where the water is applied. 

 The size of the ditch must conform to the slope and amount of 



