40 
BULLETIN 1039, U. S. DEPARTMENT OF AGRICULTURE. 
Table XXVII. — Yields of Black Voronezh proso grown in spacing experiments 
on dry land on the Belle Fourche Experiment Farm in 1916 and 1917. 
Distance between rows. 
Yields per acre, bushels. 
1916 
1917 
Average. 
7 inches 
26.1 
23.5 
16.0 
24.4 
20.9 
16.7 
25 2 
22.2 
16.3 
The average yield from the plats sown in the regular 7-inch drill 
rows was 25.2 bushels, from the 14-inch rows 22.2 bushels, and from 
the 21-inch rows 16.3 bushels per acre. Proso has rather coarse stems 
and spreading branches, and it was thought that the wider spacing 
might show a slight advantage. The yields, however, were strongly 
in favor of the thick spacing. Unfortunately, the rates of seeding 
were different with each spacing, but the results obtained in this and 
the rate-of-seeding experiment previously described seem to indicate 
that proso should be sown in drill rows about 7 or 8 inches apart at a 
rate not less than 25 to 30 pounds per acre, 
EXPERIMENT WITH GRAIN SORGHUMS. 
One or more varieties of grain sorghum were sown at Newell each 
year from 1908 to 1917, except in 1911, when the soil was too dry for 
the seed to germinate. Most types did not produce seed and did not 
always form heads because of the cool weather. The only varieties 
which matured seed were extremely early, and included Manchu 
Brown kaoliang, Dwarf milo, and Freed sorgo. The Dwarf milo pro- 
duced seed only in 1913. The yields of the leading grain-sorghum 
varieties are shown in Table XXVIII. 
Table XXVIII. — Yields of the leading varieties and strains of grain sorghum 
grown on dry land on the Belle Fourche Experiment Farm, 1908 to 1911, 
inclusive. 
C.I. 
No. 
Yield 
per acre (bushels). 
Group and variety. 
1908 c 
19096 
1910a 
1912 
19136 
1914 c 
1915 c 
1916 c 
1917d 
Aver- 
age, 
1909 
to 
1917. 
Kaoliang: 
171 
261 
261 
261 
328 
22.9 
'18.9 
13.2 
12.3 
9.4 
7.1 
"i2."2 _ 
11.6 
8.0 





5.0 
6.2 
4.6 
6.2 
4.2 
5.0 
5.8 
4.6 
3.5 
1.5 
2.5 
6.6 

6.0 









Manchu Brown Selection 3-1 . 
Manchu Brown Selection 3-5. 
Manchu Brown Selection 4 . . . 




23.6 
6.5 
Milo: 
Sorgo: 
a Yield calculated from that of an 80-foot row. 
6 Yield calculated from that of a 132-foot row. 
c Yield calculated from that of two 132-foot rows. 
d Yield calculated from that of a tenth-acre plat. 
