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EFFECT OF DATE OF SEEDING ON CORN. 11 
TaBLE 5.—Differences in the time of emergence and in the silking of corn seeded on early 
and normal dates at the Arlington Experimental Farm, near Washington, D. C., in 
1917, 1919, and 1920. 
Number of days difference in— 
iety. Dates of seedings. 
Variety : 5S Wer Appear- 
Seedings. ates ance of 
> 8 * | first silks. 
Season of 1917: . 
INOTOWe SLL mere nrrn ee once Sale he Apr. 12 and May 14. 32 25 14 
Wi, Si, SACS OTE S33 ee ae ee rag ae | (Pe Gon ose eee 32 25 9 
Bi GUVaENULOMe see Hs some ose Great cel see et Oe ite sess 32 25 8 
fockyeaMountaine Dent. 22065. 45... o6ce see. ee|-5- 2 CO salen eet. esa 32 25 13 
TEL PLO UE EVeISs 0) La, os ee ee eee GO een ceases 32 25 4 
U.S. Selection 119..........- Ee ee Soe Set hie es een GORS see uesesss 32 25 3 
Season of 1919: 
WU cbt e) LENE OS Sse ca Seer ne ee ee a ADT ANG SOF ees see 21 12 5 
Wasuselectionwe3 22. se... SEE ECE heen me eee COmxceeeceen see 21 12 6 
PR SRPSOLOCULOMG OS wis ie tee oS orcs |e Chose Ser Seems 21 | 12 6 
WMS SeleCriOMnMdQm As fees |) Re beth We GOs aeese coe fee 21 12 0 
RV ITT DO PEGEE eitece Sree eee 8 deen 2ed Sie sae Sas Apr. 9and May 14... 35 22 5 
U.S. Selection 133........ See eA AL tame ane Leap aes GOR anssets 35 22 7 
(We oroclechionel 93s seni st x. oe oss el. Sata leost (SOc Sees 35 22 10 
(WAS eS ClOCULOM IIOP Mae aes Orn Se eee oa ctelle nee GOR ease sane 35 22 3 
\AVLMTTRD TRAC SSS ok Ss ee Ry ee Apr. 30and May 14 14 9 0 
POMOC leChiOnMl sameeren Saten ucicten eke eiecees GOmS Ses essere 14 9 1 
TDs Si GEO HIOTALIR ES 5 SS ee eile eng | Le GOs Ie 14 9 3 
EO MOMOCIECELONMNO Ue OAD Saree eet owas cs (CKO ee ae eS 14 9 3 
IWAIBeERR COME aeecee ne to he Ee Apr. 2land May i4 23 18 3 
Tl, SESOe RON IB SS Cae ae eee ioe | Goes S22 ee ee 23 18 7 
UA Oe SC leC i] ONIN Oa memeac a xeieine tine eees Soe aera) aces < GOR oes 23 18 6 
Wi. SL SAG aO MOS SSeS see eee eee es eee Oss eee | 23 18 8 
Season of 1920: tm 
(UmisnoclectionMlso meen -isces seein ee Skee cbs Apr. 20 and May 7.. ily 9 9 
(Ul; Se Sa ea ron BOSE a ee eee ae eee Op esr es somacs 17 9 7 
SUMMARY. - 
The results of the experiments at the Arlington Exponent 
Farm, near Washington, D. C., are as follows: 
(1) The germination oat corn increased in rapidity as the date of seeding occurred 
later. 
(2) The total growth of stalk was greatest from the seedings in June and May. The 
rate of growth was most rapid from the June and July seedings. The total growth was 
least and rate of growth slowest from the April seedings. 
(3) Development was more rapid in the later than in the earlier seedings. 
(4) The number of ears per stalk, the size of the ear, and the amount of suckering 
bore no consistent relation to the date of seeding. 
(5) The pollen-shedding period was longer in plants from the early seedings than 
those from the later seedings. 
(6) Seedings earlier than normal resulted in slight gains in the date of silking. 
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