TILLAGE AND ROTATION EXPERIMENTS AT NEPLII, UTAH. 
41 
tions favored one plat one year and another plat the next, changing 
so frequently that no one plat had any marked advantage. The 
average moisture content in the first 6 feet of soil on all plats in the 
rotation at the beginning and end of each season from 1908 to 1913, 
inclusive, is shown graphically in figure 21. It will be noted that 
the average moisture content of the plats was usually surprisingly 
uniform, and that no great difference existed in any case. During 
the wheat }^ears the moisture content of all plats was reduced to a 
minimum, but during the alternate years the moisture content re- 
mained reasonably constant. 
YIELDS OBTAINED. 
The yields of the various crops obtained in these rotation experi- 
ments are presented in Table XVIII. No attention should be paid to 
the yields of wheat from the "B" plats in 1908, as they were occupied 
by four different varieties hi the regular varietal test, and varietal 
differences probably affected the yields. In all other years the same 
variety was used on all plats. 
Table XVIII.— Yields obtained in tests of winter wheat * in alternation with fallow and 
ivith corn, peas, and potatoes in rotation at the Nephi substation, for the years 1908 to 1913, 
inclusive. 
[Yields per « 
icre (wheat and potatoes in bushels, corn and peas in 
pounds).] 
Plat. 
1908 
1909 
1910 
Crop. 
Yield. 
Crop. 
Yield. 
Crop. 
Yield. 
12B 
Wheat 
do 
do 
do 
27.50 
25.83 
30.16 
22.66 
Fallow 
Wheat 
do 
do 
do 
13.7 
13B 
14B 
15B 
Corn (fodder). 
Potatoes 
Peas (vines)... 
Wheat 
do 
}....do 
1 do 
1,240 
84.7 
1,050 
4.66 
2.50 
2.16 
6.50 
19.3 
17.2 
18.3 
12C... 
13C 
Potatoes 
HS&:: 
Sff:: 
42.50*" 
1,080 
220 
630 
17.5 
Corn (fodder). 
Potatoes 
Peas (vines)... 
40 
14C 
7.35 
15C 
35 
/ 
Plat. 
1911 
1912 
1913 
Crop. 
Yield. 
Crop. 
Yield. 
Crop. 
Yield. 
12B 
Fallow 
Wheat 
.do .... 
14.7 
17.8 
18.8 
IS. 7 
Fallow 
13B... 
Failure. 
40 
4 
30 
28.5 
32.1 
29.5 
Potatoes 
HSE::::: 
Fodder 
ConKUnshelled 
I grain 
Wheat. 
34.5 
14B 
Corn (fodder).. 
Potatoes 
Wheat 
do 
do 
. .do 
95 
15B 
20 
550 
12C 
Fallow . 
200 
2 
13C 
H5K::: 
Corn (fodder).. 
Potatoes 
225 
90 
1,420 
32.4 
\ do . 
4.2 
14C 
do 
1 
do 
4.4 
15C 
... .do.... 
do 
4 2 
i In 1908 the wheat plats were a part of the regular varietal test, so that the results for that year should 
be disregarded. The varieties were as follows: On plat 12B, Crimean (C. I. No. 1433); plat 13B, Crimean 
(C. I. No. 1435); plat 14B, Crimean (C. I. No. 1436); and on plat 15B, Koffoid (C. I. No. 2997). In 1909 the 
last-named variety was grown on all plats, while in 1910 and succeeding years the Turkey variety (C. I. 
No. 2998) was used. 
