Experimental Error in Crop Tests 
33 
In 1915 (Table 12), the two-rate yielded 36.9 per cent less 
than the four-rate when compared in alternating single-row 
plats. In the center rows of alternating three-row plats the 
two-rate yielded 30 per cent less than the four-rate. Due to 
competition, the two-rate yielded relatively 9.9 per cent too 
low in single-row plats. In the two outer rows the ratio of 
the four-rate to the two-rate was 100:69 as compared with 
100:70 for the center rows. Competition was far less marked 
in 1915 than in 1914 because of much more favorable moist- 
ure conditions. 
In 1916 (Table 13), the two-rate yielded 21.3 per cent less 
than the four-rate when compared in alternating single-row 
plats. In the center rows of alternating three-row plats the 
two-rate yielded 6.2 per cent less than the four-rate. As the 
result of competition, the two-rate yielded relatively 16.1 per 
cent too low in single row plats. In the two outer rows the 
ratio of the four-rate to the two-rate was 100:85.9 as com- 
pared with 100:93.8 for the center rows. 
Table 13 — Relcitive yields of two rates of planting with Ne- 
braska White Prize corn when compared in alternating 
one-rotv plats and alternating three-row plats (1916) 
No. of 
rows in 
plat 
No. of 
plants 
per hill 
No. of 
replica- 
tions 
No. of 
suckers 
per 100 
plants 
No. of 
ears 
per 100 
plants 
Yield per acre 
Average 
One-row plat or of two 
center row outside 
rows 
Bushels 
Per cent 
Bushels 
1 
4 
8 
24.8 
82 
52.7 
100 
1 
2 
8 
62.5 
107.1 
41.5 
78.7 
CO CO 1 
4 
2 
8 
8 
23.0 
60.0 
79.9 
115.6 
51.8 
48.6 
100 
93.8 
53.4 
45.9 
INTRA-HILL AND ROW COMPETITION IN CORN VARIETY YIELD TESTS 
During the years 1912 and 1914, Pride of the North corn 
was compared with Hogue's Yellow Dent corn in (1) alter- 
nating single rows, (2) alternating three-row plats, and (3) 
in the same hill. A similar comparison was also made be- 
tween University No. 3 corn and Hogue's Yellow Dent in 
1914. The relative yields of the above three varieties were 
also determined by planting all in the same hill. 
