+4 BULLETIN 836, U. S. DEPARTMENT OF AGRICULTURE. 
the thinner stands outyield the others. It is necessary, therefore, to 
study the average yields for a period of years in order to determine 
the most profitable rate of seeding and spacing. 
The annual and average acre yields are shown in Table XX. It 
will be noted in this table that rates which show a slight variation 
in row space per hill in the different years are considered comparable 
and treated as a single rate. Five rates are presented here. The 
lowest annual acre yield of good brush was 134 pounds, made at the 
4 to 5 inch rate in 1918, and the highest yield was 570 pounds, made 
with the 2 to 3 inch spacing in 1915. This spacing made the best 
yield in four out of the five years and gave the highest average in 
both the 3-year and the 5-year periods. The next highest average in 
both these periods was from the spacing varying from 3.4 to 3.8 
inches. The lowest 5-year average yield was with the 4 to 5 inch 
spacing, and this rate tied with the 8 to 10 inch spacing for low yield 
in the 3-year period. 
TABLE SOK Amul and average acre yields of Acme broom corn in the com- 
bined rate-of-seeding and spacing experiments at the Woodward (Okla.) 
Field Station during periods of varying length in the five years from 1914 to 
1918, inclusive. 
{One plant in each hill; rows spaced 7 feet apart.] 
Annual acre yield (pounds). Average yield. 
between hills. | 
| 
| | | | | | 
Distance 2} (side «fe 00S seo IOI: Sete 0aT7 | jois< |S Wears, SG ee 
| 
Good. Poor.| Good. 
| } | 
/Good. Poor. ae Poor. Poor. 
Good.| ene eo | Poor. Good. Poor. 
54 
34to3.8inches| 205 40 | 530 80} 438 50°} 312-| 1067) =238:) 37 | 329 64 | 345 | 63 
4.6to5.4inches| 225 25 400 44 | 244 00} 134); 41 | 259 45 | 279 | 42 
ivy) 
ito) 
i) 
or 
i=) 
6to6.4inches.| 310} 15} 463 37 | 363 75 | 231 32 | 395| 25] 306 44 | 338 37 
StotOmnchess pf) 3-5 2)2 225. < 
eae eam 
| 
2to 3inches...| 275 | 30 | 570 85 | 456 38 | 325 81} 294) 37 | 358] -52| 384 
465 25 | 300 87 
220 | 25 | 256) 13 | 
COMPARATIVE YIELDS FROM ALL METHODS OF SPACING. 
In Table XXT all comparable rates of seeding in the different 
methods of spacing used in these experiments are Gorse. so that 
comparisons may be made easily between the annual and average 
acre yields from al! methods of spacing. Five different rates are 
represented here, and these are distributed into five groups, each one 
containing different combinations having the same number of plants 
per acre. Data given for each group are the distance between the 
rows in feet, the row space to the hill in inches, the number of plants 
in each hill, and the annual and average acre yield for each method 
of spacing. 
Group A contains the data for the thick rate in each method of 
spacing. This rate represents an average of approximately one 
—— = 
