SOKGHUM EXPERIMENTS ON THE GREAT PLAINS. 
33 
"varieties. The seed yields are especially unreliable. Many varieties 
matured seed in only three out of the five years and others in only 
two years. The results from a forage standpoint are much better, 
and the relation of the different varieties as to their forage value 
would perhaps not be greatly different if the test period were longer. 
Thin stands were obtained in many cases; but the failure to obtain 
a good stand did not decrease yields to any extent except in 1915 ; 
when the rainfall was sufficient to support a thick stand. 
Fig. 11.— A field of Spur feterita at Chillicothe, Tex., in 1920. Photographed August 23. 
The summary of Table 6 presents the results with the more impor- 
tant varieties under test. Black Amber was used as a check for the 
sorgos and Dawn kafir for the grain sorghums. 
Table 6. — Agronomic data regarding sorghum varieties grown at Amarillo, Tex., 
for one or more seasons in the 5-year period from 1913 to 1917, inclusive. 
Serial No. 
c 
M 
© 
c3 
a 
o 
to 
bo 
g 
o 
c 
Dimensions 
(inches) . 
Yields per acre. 
Variety. 
Row space. 
a 
M 
'3 
M 
Air-dry 
forage. 
Threshed 
seed. 
S 
$ 
a 
o 
a 
o 
m 
P 
O 
CO 
x: 
3 
m 
Sorgos: 
Dakota Amber 
[f. C.I. 6586 
[F. C. I. 1614 
/1914 
\1915 
J1916 
\1917 
83 
108 
71 
96 
3.8 
12.6 
13.9 
11.5 
2.2 
4.3 
7.9 
6.3 
59 
72 
39 
51 
4,419 
7,860 
849 
1,480 
2.21 
3.93 
.42 
.74 
1,278 
3,000 
143 
360 
22.8 
53.6 
2.6 
6.4 
Average 
90 
10. 5 5. 2, 55 
3, 652 1. 83 
1,195 
21.4 
fS. P.I. 32384 
|F. C.I. 6589.. 
1913 
fl914 
J 1915 
|1916 
(1917 
86| 14. 6 ( 6.0i 52 
88| 4.1 2.01 66 
108 10.2 3.3 83 
1211 8.6 4.7 57 
112, 8.7 3.7, 65 
1,790 
5,250 
9,920 
2,603 
4,900 
.85 
2.63 
4.96 
1.30 
2.45 
367 
1,159 
2,900 
404 
1,190 
6.6 
20.7 
51. 8 
7.2 
21.3 
Average 
103 9.2 3.9 65 
4,875 
2.44 
1.204 
21.5 
90483— 24f- 
