58 
BULLETIN 1026, U. S. DEPARTMENT OF AGRICULTURE. 
In Table 16 is given a general summary of all records of farm 
irrigation with the exception of those covering small areas of corn, 
peas, and other crops. The average head used may be taken as the 
head handled by one man, as only in a few cases were two men em- 
ployed in irrigating a single field. The ratio of hours water was 
APRIl 
10 2 
5 
1 
MAY 
3 2 
D 
JUNE 
10 20 
JULY 
10 20 
AUGUST 
10 20 
SEPTEMBER 
10 20 
19 
16 
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1 
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IT IT 1 Tl 
19 
17 
o 30 
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4 
1 
1 
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Fig. 9. — Water requirements of 2,500 acres of miscellaneous crops in 1916 
and of 2,000 acres in 1917. 
attended to hours it was run is lowered considerably by night irri- 
gation, and with this eliminated the ratio would probably be from 
80 to 90 for most of the crops. One of the farms for which duties 
were determined, the Jackson-Alles farm, is located on the delta 
between the Cache la Poudre and the South Platte, where the soil 
