SORGHUM EXPERIMENTS OX THE GREAT PLAIXS. 
73 
Table 18. — Agronomic data regarding sorghum varieties grown in rows 40 it 
apart in spacing experiments at Hays, Kans., during the 5-year period from 1914 
J o 1918, inclusive. 
Variety. 
Aver- 
age 
Yields per acre 
■£ 
row 
space. 
1914 
1915 1916 
1917 
191S 
Average. 
• - r. 
1 
a 
P4 
s 
GO 
Forage. 
Grain. 
Forage. 
Grain. 
Forage. 
Grain. 
Forage. 
Grain. 
Z 
§ 
= 
-^ 
'- 
> 
< 
Eed Amber sorgo.. _ 
Feterita 
Ins. 
f 2 
4 
1 6 
8 
1 12 
f 4 
8 
1 12 
16 
I 24 
1.9 
3.4 
3.6 
4.2 
4.7 
3.1 
4.3 
4.9 
5.9 
7.2 
Tons Bush. 
3. 69 9. 9 
3.41 15.1 
3. 57 18. 3 
3. 66 23. 2 
3. 16 22. 1 
3. 11 24. 6 
3. 16 28. 9 
3. 09 29. 6 
2. 95 28. 3 
2. 25 21. 5 
[■ 
Tons Bush. Tons Bush. 
4.98 27.1 1.44 0.6 
4.41 29.4 1.07 .9 
4. 4C 28.2 1.00 1.2 
3.781 24.3 1.08 1.8 
3.68 26.3 1.44 2.0 
3.59 34.9 1.58 5.0 
3.28 33.9 1.43 10.5 
2.98 26.9 1.09 6.4 
2.81 22.1 .92 5.4 
2.59 18.4 .91 6.1 
1 1 
Tons Bush. 
2. 89 10. 7 
2. 23 6. 4 
2. 26 8. 4 
1. 89 8. 
1. 78 8. 2 
2. 17 17. 5 
1. 82 13. 2 
1. 95 15. 
1.71 15.0 
1. 37 10. 4 
Tons 
2.77 
2.75 
2.74 
2.62 
2.66 
2.51 
2.45 
2.53 
2.45 
,13 
Bush. 
2.7 
4.2 
3.4 
4.0 
7.6 
12.1 
19.2 
16.8 
18.2 
13.9 
Tons Bush. 
3. 15 10. 2 
2.77 11.2 
2.79 11.9 
2.61 12.3 
2. 54 13. 2 
2. 59 18. 8 
2. 43 21. 1 
2. 33 18. 9 
2.17 17.8 
1. 86l 14. 1 
Ins. 
66 
66 
67 
68 
70 
60 
60 
58 
58 
57 
From a forage standpoint there is an apparent advantage in 
favor of the thickest rate for Red Amber. This variety did not, 
however, always mature normally in the 2-inch stand. Therefore, 
the 4-inch and 6-inch spacings are perhaps more desirable. For 
seed production of Red Amber, there was a gradual improvement 
in quality as well as average yield in proportion to the increased row 
space per stalk. 
In the case of feterita it is noteworthy that, as with Red Amber, 
the closest spacing produced the highest yield of forage. This 
factor in feterita, however, is secondary to the yields of grain, which 
were highest on the plat with 8-inch row space. It is significant 
that in only one season was the highest grain yield in 40-inch rows 
obtained at a row space in excess of 8 inches. 
EXPERIMENTS AT CHILLICOTHE, TEX. 
The row-space experiments at Chillicothe. Tex., were conducted 
with from five to nine varieties during the 11-year period. 1907 to 
1917. Owing to several changes in the outline of the experiments 
during the earlier years of the work and to unavoidable irregularities 
of stand in certain seasons, the data on some varieties are not con- 
tinuous for this entire period. Except for 1912, however, the experi- 
ments with Blackhull kafir and Dwarf Yellow milo are complete. 
During this time there were two years of extreme drought. 1911 and 
1913: and three other years— 1909, 1910. and 1916— were too 
droughty for kafir to produce grain. In noting the low average 
yields for kafir and milo, therefore, it should be considered that the 
work encountered perhaps more than a normal proportion of adverse 
seasons. 
Table 19 shows for Sumac, Freed sorghum, and feterita the effect of 
varying row spaces on the yields of forage and grain and the average 
height of plants. 
