322 IRRIGATION PRACTICE 



without further irrigation. Each irrigation in California 

 is in the neighborhood of 3 acre-inches. 



191. Quantity of water for orchards. There is little 

 exact data on the right quantity of water to use in orchard 

 irrigation. Orchards need less water than a vigorous field 

 of alfalfa. Pears can stand more water than apples; 

 apples more than peaches; citrus trees most; the olive 



FIG. 88. On the upper canal. 



endures very little water. The true water requirements 

 depend on many factors, such as climate, soil, and age 

 and nature of crop. A tree may grow with a very small 

 quantity of water which, however, may be insufficient to 

 produce fruit. 



The actual duty of water in orchard irrigation varies 

 from 60 acres to 400 acres for 1 second-foot of water. 

 Fortier states the well-known truth that where most 



