68 
BULLETIN 1260, U. S. DEPARTMENT OF AGRICULTURE. 
were attempted before May 15 except of Keel Amber in 1918, which 
was practically a failure. It was too wet for seeding at one date only; 
namely, on May 15, 1921. 
Single twentieth-acre plats were used in 1917, single tenth-acre? 
from 1918 to 1920, and single 0.08-acres in 1921. The sorghums 
were seeded in 44-inch rows on plowed ground with a surface planter 
equipped with furrow openers. 
The data obtained with reference to yields, height, and length of 
season are shown in Table 17. The forage yields for 1918 are based 
on the green weights divided by two. 
Factors with reference to the date of seeding sorghum at Tucum- 
cari have been analyzed in detail in Bulletin 130 of the New Mexico 
experiment station (3, p. 20-21). Briefly summarized, the season 
is sufficiently long to permit seeding at any time from April 15 to 
July 1 if soil conditions are favorable. Ordinarily the soil is too 
dry and in danger of blowing until May 15 or later. After May 
15 the seeding should be done as soon as there is sufficient soil moisture. 
The best average results for forage production are obtained by 
seeding from June 1 to June 15. Every effort should be made in 
preparing the seed bed to prevent soil blowing and to conserve as 
much moisture as possible. 
Table 17. — Agronomic data regarding sorghum varieties grown in date-of-seeding 
experiments at Lawton and Woodward, Okla., Dalhart and Big Spring, Tex., and 
Tucumcari, N. Mex., in the 5-year period from 1917 to 1921, inclusive. 
[Yields marked with a star (*) are interpolated, seeding being prevented by weather conditions. 
Station, variety, and 
approximate date 
of seeding. 
Yields per acre. 
1917 
Lawton, Okla.: 
Sumac- 
April 15-.. 
May 1 
May 15-... 
June 1 
June 15 
July 1 
Red Amber- 
April 15 
Mayl 
May 15..-. 
June 1 
June 15 
July 1 
Woodward, Okla.: 
Sumac- 
April 15 
May l 
May 15 
June 1 
June 15 
July 1 
Red Amber- 
April 15 
-May 1. 
.May 15.... 
June 1 
June 15 
Julv 1 
Tons 
3.48 
2.85 
2.73 
2.79 
2.83 
2.63 
1.31 
1.06 
1.10 
1.10 
1.40 
1.27 
7.25 
7.41 
7.53 
7.06 
6.66 
6.03 
2.72 
2.96 
2.28 
2.38 
2.25 
Bush 
3.7 
2.4 
4.3 
3.4 
3.1 
3.4 
7.3 
8.1 
8.8 
11.5 
14.7 
10.0 
17.6 
14.9 
20.1 


1918 
Tons 
1.53 
1. 
2. 
2.77 
1.59 
1.41 
.79 
.78 
1.38 
.89 
.4 
.55 
2.46 
2.00 
2.06 
2.19 
1.97 
2.47 
5.8 2.00 
4.6 1.14 
14.7 
18.5 
12.9 
10.5 
1.39 
1.36 
1.21 
1.31 
2.4 

1919 
Tons Bush. 
6. 05 23. 4 
6.60 
6.30 
5.68| 
6.05 
4.65 1 
3.38! 
3.40 
2.73 
3.40 
3.43 
3.23 
35.0 
24.3 
20.4 
17.0 
11.3 
28.0 
25.5 
16.3 
30.7 
12.7 
16. 3 
13.6 
13. 8 
5. 1 
15.2 
18.11 
1920 
1921 
Tons Bush. Tons 
9.68 
10. 23 
*8.70 
7. 20 
8.23 
9.55 
31.91 5.50 
31.9, 5.38 
'38. 4 4. 
41.3| 3.84 
33.3 1.42 
21.8 0.84 
Average. 
33.4. 
32.5 
30. I 1 
17.9 
5.25 
5.34 
4.89 
4.46 
4.02 
3.82 
3. 63 24. 6; 4. 55 
4.25 19.4 4.09 
>5.12j *26.0i 3.21 
6.18 45.5 2.29 
5. 35 31. 7 3. 67 
4.08 22.1 1.17 
33.9 2.73 
32.8 2.72 
24.4 2.71 
14.9 2.77 
15.2 2.86 
2.06 
3.28 
3.97 
3.53 
4.34 
4.28 
3.78 13.8 6.59 
7.17 
7.46 
7.71 
8.00 
8.21 
12.5 1.71 
6.4 2.50 
9.9 2.66 
9.9 2.19 
8.3 2.69 
9.8 2.84 
18.6 3.42 
28.6 3.38 
23.0 3.04 
25.0 4.29 
27.9 4.96 
31.0 4.50 
30.4 4.59 
25.3 5.00 
23.5 5.04 
34.5 4.83 
37.5 4.29 
j 3.06 
34.51 2.59 
34.5 2.83 
26. 2 3. 17 
33.9 3.71 
40.:, 3. 38 
3'.). 6 2. 58 
35.3 
41.1 
36.9 
40.2 
40.2 
27.2 
24.1 
30.7 
27.7 
31.3 
34.8 
21. 7 
4.95 
5.17 
5.17 
5. 2.s 
2.49 
2.56 
2.51 
2.79 
2.90 
2.61 
18.5 
20.4 
19.4 
16.6: 
12.0 
7.3 
18. S 
17.2 
15.1 
20.5 
14.9 
9.4 
18. 3 
19.6 
16. 1 
22.0 
19. 2 
8.5 
19.1 
21.0 
20.3 
23. 7 
24.9. 
22. :> 
Average-. 
Bush.l Tons Bush. In. 
Days. 
lot: 
143 
134 
121 
113 
123 
13< 
123 
112 
103 
98 
111 
163 
151 
135 
123 
112 
112 
114 
103 
103 
- 
