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Colorado Experiment Station 
poorer as the distance from the tile became greater until the middle 
point between two lines was reached. Especially was this true on the 
lines that were furthest apart and there practically no crop at all was 
grown. 
This was true of both the potatoes and the barley. Fig. 6 is a 
photograph of this field, and illustrates the condition mentioned above. 
The crop of barley did not mature and was cut for feed. The potatoes 
were not worth digging. These two crops showed without question 
that the plants at distances greater than 5 feet from the tile lines did not 
receive sufficient water, and the subirrigation system was not able to 
supply it. 
GRAIN FIELD FOR 1914 
This field was seeded to wheat for the season of 1914, and al¬ 
though the season was fairly wet and a great deal of grain matured 
in this section of the country without any irrigation whatever, yet this 
field showed the saiue characteristic as mentioned for the barley field, 
but tO' a less degree. 
Fig. 7 shows the spotted condition of the field due to a lack of 
water between tile lines. This wheat yielded about half a crop for this 
season. 
Fig. 7.—Subirrigated grain 
GRAIN FIELD FOR 1915 
The crop on this field for 1915 was corn, and the field produced 
as well as any field on the farm. This was due to the fact that the 
summer of 1915 was much wetter than usual. Although not a great 
