22 
BULLETIN 157, U. S. DEPARTMENT OF AGRICULTURE. 
each of the following dates: August 15, September 1, September 15, 
October 1, October 15, and November 1. In the years from 1904 to 
1907, inclusive, the variety used was the Odessa (C. I. No. 3274). 
This variety was replaced by the Koffoid (C. I. No. 2997) in 1908 
and 1909. From 1910 to 1913 both the Koffoid and the Turkey 
(C. I. No. 2998) have been used. Table VIII shows the average 
yields for the 6 years from 1904 to 1909, inclusive; the annual and 
average yields for both varieties for the 4 years from 1910 to 1913, 
inclusive; and the average yields for the entire 10-year period for 
V/ELD /A/ BUSHELS FEF? ACRE 
6 /O /2 /4 /6 /8 20 22 24 26 23 30 
/3.o\ 
'*Q - ~~ 
'^(2/0 
$\/s.o 
y////}////^^^^^ ■ - y/}////A 
-mm. 
m?///////wty/. y//sfomm 
t'XPlAWAftO V- 
M**>r 
CUUWATEO A/0<?MALLX 
CULTtVArEil. 
s \ ,3.o \y//////////x////^ 
Fig. 12.— Diagram comparing the annual and average yields obtained in the summer-cultivation 
tests of fall-plowed fallow at the Nephi substation, 1910 to 1913, inclusive. 
each of the six dates upon which the grain was sown. The average 
yields for the 10-year period are presented graphically in figure 13. 
Table VIII. — Annual and average yields of two varieties of winter wheat for the years 
1910 to 1913, showing also the average yields of one variety for the years 1904 to 1909, 
and of all varieties for the years 1904 to 1913, inclusive, in date-of-seeding tests at the 
Nephi substation. 
Yield per acre of grain (bushels). 
Annual yields. 
Average yields. 
Date seeded. 
1910 1911 
1912 1913 
1910-1913 
1904- 
1909,!one 
variety. 
1904-1913, 
Kof- 
foid. 
Tur- ! Kof- 
key. foid. 
1 
Tur- 
key. 
Kof- 
foid. 
Tur- 
key. 
Kof- 
foid. 
Tur- 
key. 
Kof- 
foid. 
Tur- 
key. 
all 
varieties. 
Aug. 15 
15.60 
32.20 
12.20 
9.50 
11.70 
14.20 
27.30 21.70 
36.80; 17.80 
20.80 33.80 
13.50 29.90 
16.00 22.50 
17.80 9.20 
23.50 
28.60 
36.50 
26.40 
6.00 
10.00 
13.50 
6.30 
9.40 
17.80 
15.70 
4.20 
13.40 
5.30 
7.70 
15.90 
7.30 
7.30 
Failure. 
0.67 
2.67 
3.00 
1.17 
( 2 ) 
1.70 
6.83 
10.83 
10.67 
8.83 
( 2 ) 
12.70 
14.24 
14.52 
15.05 
12.77 
9.20 
16.48 
19.38 
18.96 
16.62 
9.53 
11.70 
17.95 
20.32 
15.99 
22.00 
22.68 
20.46 
16.61 
Sept. 1 
18.92 
Sept. 15 
16.29 
Oct. 1 
Oct. 15 
Nov. 1 
19.53 
18.07 
17.12 
1 The average yields for the six years from 1904 to 1999 presented here were taken from Circular 61, Bureau 
of Plant Industry, U. S. Department of Agriculture, in which they were presented in connection with the 
annual yields for the same period. 
2 Not sown, because of stormy weather. 
