282 EXPERIMENTAL FARMS 



5 GEORGE v., A. 1915 

 MEASUREMENT OF IRRIGATION WATER. 



All the water used for irrigation was measured over a weir, and a record made by 

 a Eriez self-registering instrument. An effort has always be^n made to ascertain the 

 amounts of water used on each individual crop but, because of the large number of 

 small fields, this has not always been feasible. The quantity of water used for the 

 season was sufficient to cover the land to a depth of 1-525 feet. The depth of water 

 on the land on the Station devoted to mixed crops for the season of 1913 may therefore 

 be said to be 1-525 acre-feet. It should be stated in this connection that a continuous 

 flow of a fixed amount was not used. Water was obtained from the main canal at such 

 times, and in such quantities, as we desired. 



The following table, giving details regarding dates and quantities of water used 

 on an alfalfa field of 15f acres, may be of interest : — 



Total depth of water applied 1 - 913 feet. 



Average yield per acre of alfalfa 4 tons 230 pounds. 



The rainfall during the growing season was: — 



April 0.52 inches. 



May 1.70 " 



June 4.70 " 



July 1.29 " 



August 1.93 " 



Total 10.14 " 



The alfalfa was cut twice, and the yield of hay was 4 tons 230 pounds per acre. 

 The irrigation in September was applied for the benefit of the 1914 crop. If the rain- 

 fall in the spring of 1914 proves to be normal, probably no irrigation will be required 

 before the first cutting is made. 



Lethbridoe. 



