136 The Sugar-Beet in America 
before harvest, have been proven to be false. If the plant 
suffers for water either early in the season or late, the 
yield of the crop will be reduced. The soil auger will be 
found valuable in determining the moisture condition of 
the subsoil, and will thereby assist the farmer in judging 
when to irrigate. 
Size of irrigation. 
The amount of water to apply in each irrigation is a 
subject of constant discussion among irrigators, who seem 
unable to come to any definite agreement. This must 
Yield roots, 
Yield tops . 
1/18 tons 
le tons] 
6 tons! 
1 inch \hinches| 5 inchesith inches 
weekly | weekly | weeXly| weekly 
Tote! | 0 | 126| ae | 64 | 96 
Fia. 14. — Effect of weekly irrigations on yield of beets and tops. Utah. 
Water applied| Yield in tons per acre 
