34 BULLETIN 836, U. S. DEPARTMENT OF AGRICULTURE. 
broom corn in the 5-year period from 1914 to 1918, inclusive. It 
may be noted in this table that the highest yield of good brush from 
the Standard variety in any year was 538 pounds, produced by seed- 
ing at the thick rate in 1915, and the lowest yield was 125 pounds, 
from seed sown at the same rate in 1918. The annual yield from the 
normal rate of seeding in the five years exceeded that of the other 
rates in two years only, but the 5-year average yield of this rate is 331 
pounds. This is 18 pounds more than the average yield at the thick 
rate and 49 pounds more than the average yield from the thin rate 
in the 5-year period. The normal rate of seeding, or a stand of one 
plant to 6 or 8 inches of row space, appears to be the most profitable 
rate for a series of years. 
From the Dwarf variety the highest annual yield of good brush in 
the 5-year period was 667 pounds, which was produced by seed sown 
at the thick rate of 1915. The lowest yield, 180 pounds, was produced 
at this same rate of seeding in 1914. The normal rate produced a 
higher yield than either the thick or thin rates in only one year in the 
5-year period. However, the normal rate produced a fair yield each 
year and averaged 387 pounds in the 5-year period. This is 19 
pounds more than the average of the seeding at the thick rate and 
7 pounds more than the average yield at the thin rate in the 5-year 
period. From these results it will be seen that in a series of years, in- 
cluding both favorable and unfavorable seasons, the normal rate or 
a stand providing 6 to 8 inches of row space to the plant is the most 
profitable rate of seeding and the one that should be used for this 
variety under similar conditions. 
TABLE XII.—Annual and average acre yields of Standard and Dwarf broom 
corn in rate-of-seeding experimeirts at the Woodivard (Okla.) Field Station 
during the 5-year period from 1914 to 1918, inclusive. 
Annualacre yields (in pounds). Average 
yields 
7 hres be | forthe 
5 years, 
See years, 
Variety and rate. 1014 Jc 01s el ea tG 1917 1918  |1914t0 1918. 
| [ 
Poor.|Good.| Poor. Good.) Poor.|Good. Poor. Good. Poor. 
| | 
’ | | } 
| 
Standard: | 
TRICK. meer ewe ey, 150 90 538 118 372 78 380 45 125 | 55 313 77 
IN Orri a bases ee ee 225 1440 essa Soba 38 | 350 Sibel es A Lessil 82 
di iyis ere ce en 212 69 | 295] 220| 385 40 | 260 50 | 260 30 | 282 82 
Dwarf 
i Gk sees et a a 130 60 | 667} 133) 440 80} 390] 100] 215 45 | 368 84 
INCODTH a se ek 250 | 100} 650] 205] 361 18 1° 348 17°| 294 Pas ty | 98 
TR TY Ske a ose. etre ee 300 50 594 150 420 50 0 380 74 
305 | 100} 280 Z 
COMBINED RATE-OF-SEEDING AND SPACING EXPERIMENTS. 
The combined rate-of-seeding and spacing experiments were con- 
ducted with Acme broom corn and consist of different rates of seed- 
