EFFECT OF DATE OF SEEDING ON CORN. 
7 
TaBLe 2.—E fects of seeding on different dates upon the germination, growth, and develop- 
ment of corn, in experimenis conducted at Arlington Experimental Farm near Wash- 
ington, D. C., during the 6-year period from 1915 to 1920, inclusive—Continued. 
Number of days from— 
Height of plants 
Naooouno bv 
‘ feet). 
a Seeding to emer-| Emergence to Emergence to ( 
Name of variety. gence. first silks. ripening. 
PPPS u Glee S | ts pei oe (ea 5 Seo) eS 
| 3 ai|al|s a laa | 3 = a 3 = 
a/s e Se E tye accdiial Lar B Salas Sl E = 
Season of 1919—Contd. 
Martens White 
Ment. 5. 3. ae NAB LOY 6s | Gule5on| p42 5) 452 |e Sele occa 91} 96} 6.5] 6.0] 6.0] 5.0 
U.S. Selection 133.| 14 | 10) 6 GileoO) S402 46 Eee ose eas 96} 98) 65] 6.5] 6:2] 6.2 
Wilson WhiteCap.| 14] 10| 6] 6} 61 | 47} 46]..../.....]..-.- 105; SLOT Raeonls soul Seon dae 
INDIO eee ee DASE OR Gs anGuleol|h43) |K40s| one ol eiccis|ec oer OV | AO8F eeOule TO 2630) |aev0 
U.S. Selection 198.; 14/10] 6] 6{| 60} 50} 51]... -| eps ae hf sa 111| F BAO eSa0: eles |b ae 
LOVED ayeBristolas.\el4 | o10)4) 6) > Ge) 6h 1-51) 52 |e. |2 5-5 lo... 115) F SEO Fle Sas Osea SaO 
U.S. Selection 120.| 14} 10} 6]| 61 68 | 60] 59 ]....)..-..]..-... 120| F Saal SES Wiel Oa SaO 
Laguna <n isescer oe 14S hat hnGul e6y 4800) Gor (67)| 65) 5222] 2552 127 )> FE je11.0'} 10. 2°| 11.5) 10.0 
U.S. Selection 119.| 14} 10] 6| 6] 71 | 61 | 62 | 59}..-..)..-.- 1228 OE oa | halle Oe 
Average (12 va- | 
FIQbICS) ce ees: AA ELOR| « Gyl¥e6 15 G01 1747 1150) 22 eee le 103 |} e92} 7.6.| 7.2| 7.6} 6.9 
‘Season of 1920: | 
Cornforth Dent....| 20; 9] 6) 5 | 56} 47 | 39! 38 | 100 TGR Sale oaia| vos OM a BONOn NOs 
Northwestern 
Dense eos: ZOOM 9 a|e, Gulaeson O89 46 40" (39%) 100:)- 945)" 798) BT 1Sh7 [a> 5: 0) 522!) 15. 
U.S. Selection 133.| 20! 9] 6)| 5] 65} 52} 43] 43 | 109} 97] 86] 92] 6.2] 7.0) 7.0] 6. 
San Miguel......:. 20| 9| 6| 5 | 67} 54] 46 | 49] 113] 100] 105; 97) 6.2) 6.5) 7.0] 6. 
Malton ee ee. 20; 9] 6) 5| 67} 52} 43) 44) 112} 100} 91] 97) 6.5] 7.5) 8.0] 7. 
100-Day Bristol...| 20; 9] 6); 5} 72 | 62) 53} 50) 119| 111] 114] F Seon. Qh Oh ari Oe 
U.S. Selection 119.| 20! 9{] 6; 5] 80] 68} 57 | 57 | 125) 121 | 122| F 9.5 | 10.2 | 10.5 | 10. 
WaeInaerse sae 20; 9] 6{| 5] 90] 77 | 65 | 66} 130] 1383} F Wy 102511087, (Osh 8: 
Average (8 va- 
rietieS) |... ..<.- 20; 9] 6! 5| 69] 57 | 48 | 48 | 113] 106 | f96 | 992] 6.8| 7.7] 7.9] 7.38 
SUMMARY OF THE DATA FOR THE YEARS 1915, 1917, 1919, AND 1920 (1916 AND 1918 NOT INCLUDED). 
Number of days from— 
; ; Number Height 
Date of seeding (on oes the 20th of the of seed- |-Seeding | Emer- Emer- | of plants 
we ings to gence gence (feet). 
emer- to first to 
gence. silks. | ripening. 
JN TBD oan aac SB CASO OS SOS SIE See toa ee ee le 63 17 63 h 112 6.3 
DW es yy ose Rigas een ee Bo ee EASE ee ee ee 63 10 51 h 99 (a74 
AER eshad seb bb 6aS BA 6s GHOBREE OC ES AEE ene aoe eta | 63 7 45 793 7.4 
TIHRVE Ses Ses JSS ao ee 2. Oe ee ee eee | 63 6 43 791 6.4 
e Average of 7 varieties. 
The same 7 varieties averaged 91 days from the June seeding. 
The same 7 varieties averaged 111 and 102 days for the April and May seed- 
Ff Average of 7 varieties. 
ings, respectively. 
9 Average of 5 varieties. 
Seedings, respectively. 
h Data from 51 seedings. 
é Data from 59 seedings. 
j Data from 23 seeaings 
required 103, 87, and 85 
days 
The same 5 varieties averaged 107, 97, and 87 days for the April, May, and June 
These 23 seedings were of the earliest maturing varieties. 
from the April, May, and June seedings, respectively. 
The same varieties 
In 1919 12 varieties were grown. The dates of seeding were April 
21, May 20, June 20, and July 21. 
The different seedings were made 
in single rows 66 feet long and 3.3 feet apart on uniform reclaimed 
river land that had been cropped to corn the previous year. 
The 
stand of the earlier small varieties was one plant every 10 inches in 
the row and of the larger varieties one plant every 16 inches. 
