SORGHUM EXPERIMENTS OX THE GREAT PLAINS. 
37 
Table 6. — Agronomic data regarding sorghum varieties grown at Amarillo, Tex., 
for one or more seasons in the 5-year period from 1918 to 1917, inclusive — 
Continued. 
Summary for the More Important Sorghum Varieties. 
Grow- 
ing 
season. 
Row 
space. 
Height 
of 
plants. 
Yields per acre. 
Variety. 
Plant. 
Stalk. 
Air-dry forage. 
Threshed seed. 
Aver- 
age. 
Rela- 
tive. 
Aver- 
age. 
Rela- 
tive. 
Sorgos: 
Black Amber ' 
Days. 
103 
106 
106 
128 
124 
121 
134 
134 
120 
121 
123 
128 
130 
125 
113 
104 
105 
Inches. 
9.2 
12.7 
8.0 
6.2 
8.6 
5. 5 
5.1 
9.0 
12.6 
9.7 
9.4 
15.6 
16.1 
11.0 
9.7 
11.0 
12.3 
Inches. 
3.9 
5. 5 
3.9 
4.1 
4.9 
3.5 
3.1 
4.5 
8.0 
5.6 
4.2 
8.8 
7.3 
5.9 
5.1 
4.4 
4.6 
Inches. 
65 
59 
57 
60 
73 
46 
61 
60 
43 
44 
55 
50 
51 
48 
36 
48 
50 
Tons. 
2.44 
2.42 
2.65 
3.43 
3.36 
3.85 
4.79 
4.00 
1.71 
2.29 
2.52 
2.51 
2.67 
2.49 
2.01 
1.95 
2.17 
Per ct. 
100 
99 
109 
141 
138 
158 
196 
164 
75 
100 
110 
110 
117 
109 
88 
85 
94 
Bush. 
21.5 
20.1 
15.6 
8.6 
9.8 
9.8 
4.8 
4.5 
16.0 
21.6 
16.7 
15.1 
16.5 
14.3 
26.2 
23.5 
20.2 
Per ct. 
100 
Clubhead 2 . 
93 
73 
Orange . 
40 
46 
Dwarf Ashburn 
46 
22 
21 
Grain sorghums: 
74 
100 
Sunrise kafir ... 
77 
Dwarf Blaekhull kafir .. 
70 
Pink kafir ... 
76 
66 
Dwarf Yellow milo 
121 
Feterita (F. C. I. 811) 
Feterita (S. P. I. 22329)... 
109 
94 
1 Black Amber was chosen as the check variety of sorgo, because Sumac, though it is more generally 
grown in the locality adjacent to Amarillo, matured seed only one year out of the five included in the 
test. 
2 Clubhead sorgo was not included in the tests for 1913; hence, in order to make the average for this 
variety comparable with those of the others which were grown throughout the 5-year period, the yield 
of Black Amber in 1913 was substituted for the yield of Clubhead for that year. 
3 Dawn kafir was selected as the check for the grain sorghums because of its adaptability to conditions 
at Amarillo and its generally creditable performance throughout the period included in the test. 
In Table 7 the yields of the less important varieties are given. 
These yields are compared with those of the same varieties that were 
used for checks in the summary of Table 6, and the relative yields 
are given in percentages of the check. A direct comparison is pos- 
sible, therefore, between the varieties included in the two tables. 
No varieties of outstanding merit were found among those discussed 
in Table 7. 
Sumac sorgo made the largest forage yields of any sorghum. This 
variety very rarely makes a good seed crop at Amarillo, which neces- 
sitates the purchase of a large part of the seed required for each year's 
seeding. The seed has to be shipped in from outside points and is not 
always uniform in its behavior under Amarillo conditions. 
The Honey, Dwarf Ashburn, and Orange sorgos are other good 
forage varieties. None of them produce seed very consistently, 
though the Dwarf Ashburn and Orange are better in this respect than 
the Sumac. The Colman is a variety much like the Orange, and the 
results of the two years' test suggest that it is capable of making 
higher yields of forage than the latter variety. 
Among the grain sorghums a late-maturing strain of Pink kafir 
made the highest yield of forage and Dwarf milo the highest yield of 
grain; however, the first-named variety was deficient in grain and 
Dwarf milo produced 12 per cent less forage than the check variety. 
No variety combining the two essentials, grain and fodder, was found 
superior to the check, Dawn kafir. 
