30 BULLETIN 836, U. S. DEPARTMENT OF AGRICULTURE. 
brush if the crop is in the heading stage at that time. This may be 
avoided by seeding either early or late. 
TABLE X.—Annual and average acre yields of Acme broom corn in date-of- 
seeding experiments at the Woodward (Okla.) Field Station in the 5-year 
period from 1914 to 1918, inclusive. 
| 
Annual acre yields (pounds). Average yields. 
| : } 
| | | 
Date of |2 years, 1917) 3 years, 1916 
seeding. 1914 | 1915 | 1916 | 1917 | 1918 | aad 1918. to 1918. 
| San 
|Good.| Poor. Geen | Poo, ood Poor. | Poor. ‘200d | Poor. | Poor. Good.| Poor. Gosdlne eects. Poor. ee Poor. Good. | Poor. 
| | 
: | Bera 37/280 62 
ApEsGs se = CSE aaa SRE AS Bae hn Sie ee | 275 68 | 286 D7) = 2805[=o 2028] a6 ae eee 
May land 2.-.|...... fe: Ses eee ee eee 717 25 | 350 | 106} 193 50 | 272| 78) 420 60° 
May l4and 15.| 305 GOOF SS eee 556 7 | 450 81} 214 14 | 332 | 47 | 407 34 
May 22 tOr20e22| = o-oo 600 | 155 | 378 55 | 394 39 | 283 28; 339; 33] 352 41 
June Wea s2 2225s <8} iS st eence 328 22 | 507 36 | 238 12|. 372| 24]. 358 23 
June 10to15 -.)...... | a5 ee 750, |= 45-| 24054 S68 |5-see lesa $20. | “142 fe ep eel ree 
FuneIS.to0 2222) he... 875 |: 20 | 378 |= 55.) 9625 | 44) eee ee [zeae 
July 1to7..... Pee | ae | 630| 70] 457| 57) 633) 50| 260) 90) 446 | 70 | 450| 66 
RATE-OF-SEEDING EXPERIMENTS. 
The rate-of-seeding experiments were conducted with Standard 
broom corn, C. I. No. 556, and Dwarf broom corn, C. I. No. 557, 
in the 5-year period from 1914 to 1918, inclusive. Both varieties 
were sown in each year at three rates, designated as thick, normal, 
and thin. These rates represent stands of approximately one plant 
to 4 inches of row space in the thick rates, to 7 inches in the nor- 
mal rate, and to 10 inches in the thin rate. All rows were spaced 3.5 
feet apart. The combined rate-of-seeding and spacing experiments 
with Acme broom corn, C. I. No. 248, have these same rates included. 
A discussion of these experiments follows later. 
The agronomic data from the rate-of-seeding experiments are 
shown in Tables XI and XII. It will be seen in Table XI that 
the stand in each rate of seeding is not exactly the same for both 
varieties the same year; neither is it the same for each rate in the 
different years. But the difference in the stands of the varieties in 
the same rates in any one year is so small that its influence on yields 
is considered negligible. 
The total growing period for the Standard broom corn in the 
different years ranged from 94 days in 1914, the shortest time re- 
quired, to 132 days in 1917, the longest. For the Dwarf variety in 
these same years the time was 91 days and 117 days, respectively, 
which is 3 days less in the first year mentioned and 15 days less 
in the second. In each of the other three years the Standard required 
from 6 to 11 days longer to mature than the Dwarf. 
In 1914 neither variety produced suckers. In 1915 none were 
produced in the thick or the normal rates of the Standard broom 
