214 



Bulletin 37. 



at the farm, and the relative humidity determinations were made 

 at the Phoenix Weather Bureau, two miles distant : 



DURING 1 899- 1 90O. 



The winter irrigation this season was begun December 16th. 

 Water was applied about as rapidly as the soil would absorb it. 



Winter irrigated vineyard and orchard, July, tgoo. 



until three feet in depth had been given the orchard. The last 

 irrigation of the winter occurred March 5th. 



As soon as the soil was dry enough, the orchard was plowed 

 each way about a foot deep, harrowed thoroughly and left for the 

 summer. After summer showers, a cultivator was run over the 

 surface to break up the crust that formed. In this way an earth 

 mulch six to eight inches deep was maintained. No water was 

 applied for over eight months, during which period the rainfall 

 was but two and one-half inches, divided among fiVe rains. 



As during the previous season, the trees remained in excel- 

 lent condition throughout the summer. During May and June 



