Experimental Error in Croj) Tests 
11 
Table 36 — Nebraska data compiled to show results secured by 
the Nebraska Experiment Station f rom ear-to-row breed- 
ing if compared by the method of the Office of Corn Inves- 
tigations reported in Table SI 
Average 
yield for 
first seven 
years, 1901- 
1907 inclusive 
Average 
yield for 
second seven 
years, 1907- 
1913 inclusive 
Ratio 
Average 
yield for 
nine years 
previous to 
first period 
Yi3ld for State of Ne- 
braska as CDmpiled 
from U. S. Year- 
book 
Average yield for 
Lancaster County. 
Bushels 
28.3 
30.0 
Bushels 
23.4 
21.0 
100:82.7 
100:70 
Bushels 
24.1 
General crop of Hog- 
ue's Yellow Dent 
corn at the Nebras- 
ka Experiment Sta- 
tion 
69.6 
45.6 
100:65.5 
Yield per acre, at the 
Nebraska Experi- 
ment Station of 
TTncrnp'G p 1 1 n w 
Dent corn which 
has undergone con- 
tinuous ear-to-row 
breeding since 1902 
81.5* 
! 
1 
1 
49.9 
100:61.0 
Yield per acre at the 
Nebraska Experi- 
ment Station of or- 
iginal unselected 
Hogue's Yellow 
Dent corn used as 
check for measur- 
ing improvement 
from breeding t . . . . 
• 
47.2 
*The yield for ordinary Hogue's Yellow Dent Corn for 1901 is included 
in this averag-e. 
tAveraging- together these data for the seven years 1909-1915 — during 
which period the precaution was taken to have strictly comparable results 
by thinning to a uniform stand and to reduce error by several replications — 
we have an average yield for the continuous ear-to-row breeding stock of 
49.2 bushels, and the comparable check yield is 48.9 bushels. 
