CROPS UNDER FALL IRRIGATION" AT SCOTTSBLUPF. 
No attempt was made to conduct these experiments in definitely 
established crop rotations. The principal feature in the sequence of 
crops from year to year was that in most cases a cultivated crop fol- 
lowed an uncultivated one. For example, plat 2 in each series grew 
wheat in 1911, corn in 1912, and oats in 1913; and plat 11 in 
each series grew beets in 1911, wheat in 1912, and corn in 1913. 
The field on which these experiments were conducted was broken 
in the spring of 1910, so that all of the crops grown in 1911 were 
produced on virgin soil. The sequence of crops on the plats in both 
series during the years 1911, 1912, and 1913 is shown in Table II, 
Exactly the same sequence was used in Series VI as was used in 
Series VII; that is to say, for any given plat in Series VI in any one 
of the three years the corresponding plat in Series VII in the same 
year was planted to the same crop. 
Table II. — Sequence of crops in the plats in Series Viand VII, used for the fall-irrigation 
experiments at the S cot tsbluff Experiment Farm in 1911, 1912, and 191-3. 
Plat Xo. 
Year and crop. 
Plat No. 
Year and crop. 
1911 
| 
1912 1913 
1911 
1912 
1913 
1 
Potatoes . . 
Corn 
Beets 
Barley 
Wheat.... 
Oats 
Corn 
Beets 
Barley. 
Oats/ 
Wheat. 
Beets.i 
Potatoes. 
Corn. 
Oats. 
Wheat. 
9 
Oats 
Potatoes . . 
Beets 
Wheat 
Oats 
Potatoes . . 
Barley 
Beets 
Barley 
Oats." 
Wheat 
Potatoes . . 
Beets 
Barley 
Oats 
Wheat 
Beets. 
Wheat 
Barley 
Oats." 
Potatoes . . 
Beets 
Wheat.... 
Barley 
10 
3 
11 
4 
12 
Oats. 1 
13 
Wheat i 
6 
14... 
Beets. 
15 
Corn.i 
8 
16 
Barley. 
1 These plats were used for a special experiment in 1913, and the yields of the crops are not considered in 
this report. 
Table II shows that with the exception of plats 4, 9, and 15, an 
intertilled crop (potatoes, corn, or beets) was grown in alternation 
with either wheat, oats, or barley during the 3-year period. 
RESULTS OF EXPERIMENTS. 
A discussion of the cultural treatments applied and of the results 
secured in the fall-irrigation experiments during the 3-year period is 
given in the pages that follow. 
WHEAT. 
Defiance spring wheat was used in these experiments and was 
planted with a press drill at the rate of 6 pecks per acre each year. 
In 1910 the land in both series was plowed during the first week in 
September. Both series were harrowed and leveled after plowing, 
On September 15 Series VI was irrigated. After the irrigation it 
seemed advisable to harrow Series VI for the purpose of checking 
evaporation, and in order to preserve uniformity both series were 
