Mle 







f 
SPRAY IRRIGATION. ~~ ay 
can run tests up to a flow of 20 gallons per minute. Larger and 
deeper wells require special power equipment for testing. 
The boring of deep wells for artesian waters should be undertaken 
by an expert familiar with the local underground conditions. De- 
| 



















ee 
Oe Sb 
ae, o = 
OG and 
Po oF a 
Pos soe 
ZO 
2 
Ul [> oe. 
ae OR 
; 



ro 

° 
SORES 
La 

eee 

termining in advance the probability 
of obtaining artesian water sufficient 
for irrigation purposes is a very diffi- 
cult problem. Geologists familiar with 
the underground formations and hav- 
ing records of some deep wells in the 
vicinity upon which to base their judg- 
ment often can render a fair opinion. 
However, it always is more or less a 
gamble until the well is completed, and 
a farmer should not take the risk 
unless he is prepared to lose. 
Deep wells are no more difficult to 
pump than shallow unless the water 
fails to rise to within suction lift of 
the surface. When it is necessary to 
sink a pit or a large casing deep into 
the earth to admit the installation of 
deep-well machinery, as is illustrated 
in figure 6, the cost is apt to be great 
ope orp 
» cote 
Yi 

Yi. 



7 
i 



Fie. 5.—Typical installation of : ; : 
vertical-shaft centrifugal pump and will be justified only where water 
Swi halt tu be can besobtamed, im suticient amounts 
Pump in this case is sub- ie. s 
merged in water. 1, Engine; to irrigate a correspondingly large 
2, engine foundation; 3, fuel. 
toni) 64,5 belt; o.4 vertical, 2°TSASes et teens 3 
shaft and bearings; 6, water Unlike water for drinking purposes, 
cooling pipe for engine; 7, dis: water for irrigation need: not be. pure 
‘charge pipe; 8, pump; 9, suc- 
tion pipe; 10, well casing; from a bacterial standpoint. It is 
11, ‘well screen. therefore allowable to draw on both 
waters near the surface and artesian supplies in the same well (fig. 6) 
by having the casing perforated or slotted wherever a good water- 




2 
a a —— - s 
a 
ee 

a |. Sa a ae ee eo es 

— a 
<= 
= 
