CROPS UNDER FALL IRRIGATION AT SCOTTSBLUFF. 17 
(3) These experiments included wheat, oats, barley, potatoes, 
sugar beets, and corn. Three years' results have been obtained with 
wheat, oats, and barley, and two years' results with potatoes, sugar 
beets, and corn. 
(4) With very few exceptions, higher yields of each crop were ob- 
tained each year from the land which was fall irrigated than from 
adjacent land which was not fall irrigated. Considering the average 
results of three years, fall irrigation increased the yield of wheat 19 
per cent, of barley 23 per cent, and of oats 15 per cent. In the aver- 
age results of two years, fall irrigation increased the yield of corn 22 
per cent, of sugar beets 15 per cent, and of potatoes 2 per cent. The 
average increase in the yield of the six crops on fall-irrigated land was 
16 per cent. 
(5) With the exception of potatoes, the yields of all the crops were 
increased by fall irrigation sufficiently to more than pay for the cost 
of the fall irrigation. 
(6) Soil-moisture studies made on the wheat plats in 1911 showed 
that the fall-irrigated land contained more soil moisture to a depth 
of 6 feet throughout the season than the land not fall irrigated. The 
greatest differences in soil moisture were found in the lower depths 
of soil, particularly the sixth foot, which contained from 3 to 9 per 
cent more moisture on the fall-irrigated land than on the land not 
fall irrigated. 
(7) The difference in soil-moisture content during the growing sea- 
son appears to have been due to the fact- that the land which was not 
fall irrigated was comparatively dry at planting time in the spring 
and that it consequently absorbed water less readily than the fall- 
irrigated land, which was well supplied with moisture at the begin- 
ning of the season. 
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