46 BULLETIN 836, U. S. DEPARTMENT OF AGRICULTURE. 
was in use only three years, from 1916 to 1918, inclusive. In that 
time the first method of spacing, with one plant in each hill in rows 
spaced 3.5 feet apart, gave the highest yield in one year only; but its 
average yield in the 3-year period exceeded that of any of the other 
methods in use. 
TABLE XXI.—Annual and average acre yields of Acme broom corn in the com- 
bined rate-of-seeding and spacing experiments at Woodward (Okla.) Field 
Station in most or all of the five years from 1914 to 1918, inclusive, shoicing 
the results obtained at all rates of seeding in all methods of spacing, arranged 
in five groups, each containing rates having the same number of plants 
per acre. 
Group A.—AVERAGE OF 1 PLANT TO 4.5 INCHES OF Row SPACE, OR 35,200 PLANTS TO THE ACRE. 
| Hills. Annual acre yields (pounds). Average yields. 
Pages creas 
Distance be- | = || e914 1915 1916 1917 
tween rows. | s 
| & F ey 
| iS af S bets (SS ees | Se Ss ee eee 
S S18 128. 6S 4-8 feS 1S 1 ook S16 Sole ae 
D Bo] Oo he]: fear} ool a] Sat be owlias | Geer erates 
ASOD Renee 1 | 215 | 90 | 775 87 | 405 | 65 | 380 | 125 | 180 | 34 | 322 | 75 | 391 80 
Reha eareee 2 | 250 |100 | 710 | 160 | 472 | 39 | 428 | .50 | 186 | 64 | 362 | 51 | 409 | 83 
Reciy Als Pogs eat Weel pe cel eed | ae 525 | 65 | 469 | 25 | 256 | 38 | 417 | 42 |___.. toe 
|| 2x O oaecseeee 275 | 30 | 570 | 85 | 456 | 38 325 | 81 | 294 | 37 | 358 | 52 | 384 54 
Group B.—AVERAGE OF 1 PLANT To 6.5 INCHES OF Row SPACE, OR 24,400 PLANTS TO THE ACRE. 
3.5 feet -...--=- BUO U dons 1 | 305 | 60 | 685 | 110 } 531 | 44 | 350 | 90 | 281 | 38 | 387 | 57 | 480 | 68 
3.0 feet ....---- 12to14..... 2 | 275 | 60 | 670 | 135 | 557 | 50 | 300 | 122 | 271 | 29 | 376 | 67 | 414 | 79 
Sbileetstces- ce 26:8:¢0)28:8 so[le 4] ose] ce | Shas eee 480 | 50 | 372 | 72 | 242 | 29 | 3€5 | 50 |_....}___- 
dslecteec—- = | 3.4t03.8....| 1 | 205 | 40 | 530 | 80 438 | 50 | 312 | 106 | 238 | 37 | 329 | 64 | 345 63 
Group C.—AVERAGE OF 1 PLANT TO 9.5 INCHES OF Row SPACE, OR 16,700 PLANTS TO THE ACRE, 
75 | 480 | 75 | 290 | 55 | 235 | 25 | 335 | 52 | 369 | 50 
3:0 feeb =. 2 <= StolOe-e 1 | 250 | 20 | 590 
SACO eee eee 18 to 21......| 2 | 365 | 20 | 695 | 80 | Sil | 44 | 228) 45 | 200 | 22 | 313 | 37 | 400 | 42 
TNGE bee eee 4.6t05.4....] 1-| 225 | 25 | 390 
50 | 400 | 44 | 244 | 50 | 134 | 41 | 259 | 45 | 279 | 42 
Group D.—AVERAGE OF 1 PLANT TO 12.5 INCHES OF Row SPACE, oR 12,600 PLANTS TO THE ACRE. 
l 
SUCOb soe ees Pibbiroyit esas 1 | 280 | 10 | 735 | 70} 415 | 90} 295} 55 | 257 | 43 | 322 | 63 | 396 | 54 
sO 1GCU ces = ae | 23 to 28 2 | 340 | 10 |-580 | 45 | 400 |100 | 289 | 39 | 343 | 14 | 344 |] 51 | 390 | 42 
(EG eae POT OMS ioe 1 | 310 | 15 | 463 | 37 | 363 | 75 | 231 | 32 325 | 25 | 306 | 44 | 3388 | 37 
Group E.—AVERAGE OF 1 PLANT To 18.5 INCHES OF ROW SPACE, OR 8,500 PLANTS TO THE ACRE. 
S2ouleatese oa" ICs Keyes 1 Sages .----| 295 {120 #330 | 65 | 288 | 37 | 304 | 74 |2--2-[- = 
Soneebes- o=. == 30 tole. 52 2 Vocecc| so-2|=- esc] ose s-| BODE OG: [211 (225) 300 ral S272, Nos See ae 
Wei epe a ae Sito OR es ii eee 5 ose 465:} 25 | 300 |} 87 | 220 | 25 | 256 | 13 | 259 | 32 |.--2.|2_.. 
In summing vp the results from the rate-of-seeding and spacing 
experiments, it-1s interesting to note that-the crop grown in rows 
spaced 3.5 feet apart gave the highest average yield in all five groups 
or rates in both the 3-year and the 5-year periods. The first method, 
with one plant in each hill in rows spaced 3.5 feet apart, gave the 
highest average yield in groups B, C, and E, or in three of the five 
tiie 
a ee ee 
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