SORGHUM EXPERIMENTS ON THE GREAT PLAINS. 
68 
August. This rain, though helpful, was not so effective as might be 
expected. Drought conditions returned in the fall, checking growth 
so that some plats were still immature on October 20 when the first 
frost occurred. 
The results obtained from the date-of-seeding experiment- a 
Amarillo, Tex., are given in Table 16. These data are rather irregular 
on account of the unfavorable growing conditions prevailing several 
years during the period. 
Table 16. — Agronomic data regarding sorghum varieties grown in date-of-se< 
experiments at Amarillo, Tex., in the 5-year -period from 1913 to 19V, . 
elusive. 
Yields per acre. 
Average. 
Variety and 
approximate 
1913 
1914 1915 
1 1 
1916 1917 Average. 
seeding. 
S3 
— 
o 
3 
6 
tx 
Gfl 
•_ 
C 
c sc | a 
"3 S 3 
s- O t. 
bo 
O 
"3 i c 
5 i 
•3 I 
•- S 
"Z En 
a 
O 
2 
'3 
-J. 
Sumac: 
April 15— 
May 1 
May 15.-. 
June 1 
June 15 
July 1 
Red Amber: 
April 15 -- 
Tons. Bush. 
0. 64 ; 
.88 
.57 ! 
1. 25 
1.45 
1.35 
Tons. 
3.45 
3.10 
3.05 
3.65 
3.10 
1.85 
2.75 
2.55 
2.05 
2.20 
2.15 
1.50 
Bush. 






17.7 
10.7 
9.2 
11.1 
9.6 
1.4 
Tons, i Bush. 
9. 14 37. 9 
8.51 : 23.7 
8. 76 36. 8 
9. 71 35. 1 
12. 13 : 
11.88 ! 
1. 66 ! 22. 1 
2. 44 29. 5 
1. 80 16. 5 
4. 44 49. 6 
5.03 1 48.0 
5. 53 29. 3 
Tons. 
3.26 
3.03 
4.46 
4.34 
3.51 
.24 
1.06 
1.54 
1.96 
1.63 
1.54 
.46 
1.66 
.97 
1.31 
.78 
1.01 
.56 
Bush . 









2.2 
10.5 

1.2 
6.7 
3.7 
2.8 
7.5 
0.8 
Tons. 
4.44 
4.74 
3.88 
2.96 
3.40 
3.63 
2.15 
2.38 
3.88 
2.11 
3.11 
2.81 
.85 
2.08 
1.90 
2.04 
3.15 
3.14 
Bush J Tons. 
4. 19 
! 4.05 
j 4.14 
4.38 
i 4.72 
j 3.79 
20. 1 1 1. 91 
14.3 ! 2.23 
^2.42 
16.3 2.60 
22. 8 I 2. 96 
10. 5 2.58 
2. 2 1. 26 
9. 2 1. 53 
10.1 1.61 
15.0 1.41 
15. 9 2.08 
15.0 1.85 
Bush. 
7.6 
4.7 
7.4 
7.0 


15.0 
13.6 
6.4 
19.8 
22.7 
10.3 
1.7 
8.0 
6.9 
8.9 
11.7 
r.t 
1. 1 
Inches. 
57 
56 
60 
60 
56 
57 
60 
58 
62 
62 
69 
62 
48 
46 
48 
55 
56 
61 
.".4 
54 
56 
52 
58 
62 
42 
43 
44 
44 
51 
61 
Days. 
159 
147 
13( 
134 
124 
115 
131 
May 1 
122 
May 15 
12<> 
10'* 
100 
July 1 
109 
Clubhead: 
April 15. - 
146 
Mayl— - 
-. 
134 
12] 
June 1 
ior 
June 15 
102 
July 1 
9 
Freed sor- 
ghum: 
April 15.-. 
May 1 
May 15-.. 
June 1 
.61 
.40 
.41 
.63 ■ 
.60 
.40 
.60 
0.7 
1.13 
.90 
.82 
2.73 
3.22 
2.64 
1.44 
1.53 
.97 
3.38 
3.79 
3.19 
2.7 
2.3 
3.4 
21.2 
30.6 
16.1 
13.4 
14.1 
5.1 
43.5 
35.7 
29.0 
.78 
107 
.95 2. 5 
.55 2. 9 
.70 3. 8 
.65 2.9 
1. 40 7. 7 
. 75 1 1. 6 
.59 2. 1 
1.35 8.3 
1.49 11.2 
1. 48 7. 9 
101 
95 
- 
)2 
101 
July 1 
Feterita: 
April 15... 
May 1 
May 15--. 
June 1 
June 15 
July 1 
io : 
.65 
.48 
.40 
.80 
1.02 
.80 






.65 
1.65 
1.55 
1.90 
.70 
1.10 
3.8 
12.5 
12.7 
13.9 
10.9 
4.1 
1.31 1.7 
1.01 1.4 
1. 04 8. 6 
.65 8.7 
1. 65 10. 9 
.19 
2.01 
2.21 
1.93 
1.85 
1.78 
1.83 
13.0 
11.7 
11.5 
13.9 
14.5 
16.4 
1.21 
1.38 
1.18 
1.72 
1.79 
1.42 
6.4 
7.9 
7.6 
16.0 
14.4 
9.9 
115 
10< 
107 
102 
108 
It is difficult to draw conclusions from an inspection of these data. 
except in the light of the previous rather detailed explanation con- 
cerning the factors involved in each season's work. One of the out- 
standing indications of the test is that seeding before May 1 has no 
advantages over a later seeding. Between May 1 and June 15 the 
date of seeding should be at whatever time soil conditions are favor- 
able for uniform and prompt germination. When sorghum follow- 
sorghum or Sudan grass the date to seed will probably be later on 
the average than if sorghum follows a crop less exhaustive of soil 
moisture. The experiments also indicated the importance of thor- 
ough and early work on the seed bed to conserve any moisture that 
