UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 495 
Contribution from the Office of Public Roads and Rural Engineering 
LOGAN WALLER PAGE, Director 
SPRAY IRRIGATION 
By 
MILO B. WILLIAMS, Irrigation Engineer 
CONTENTS 
Introduction Ce) ey. (ex ey (8) @Cree eels 
Economic Conditions Justifying Spray 
PERICRMON Ch Teh vet leliia oeiliel rele jielare 
Farm Conditions Adapted to Spray Irriga- 
tion CONE OOO NSE Ocean elec iey te 
Amount of Water Required for Spray 
PLPIGQUON, ss, 0! eu, eiiieiven we ce le 
Development of Water Supplies. . . . 
Screening Water . ......2.-. 
Page Page 
1 | Types of Spray Irrigation Systems .. 14 
Stationary-Nozzle Spray Systems . . 15 
2 | Stationary Overhead Spray Systems . 18 
Types of Pumps for Spray Irrigation . 25 
5 | Designing of Spray Irrigation Systems 29 
Designing of Pumping Plant... . 32 
5 | Outline of Procedure for Installing Spray 
6 Irrigation Systems . . 2. 2» 2 2 » e 
12 | Cost Data . . « 0 «© ee © © © © 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1917 



