EFFECT OF DATE OF SEEDING ON CORN. 



Table 2. — Effects of seeding on different dates upon the germination, growth, and a 

 ment of corn, in experiments conducted at Arlington Experimental Farm neat 

 ington, D. C., during the 6-year period from 1915 to 1920, inclusive — Continue 





Number of days from — 



Height of pla 

 (feet). 



Name of variety. 



Seeding to emer- 

 gence. 



Emergence to 

 first silks. 



Emergence to 

 ripening. 





ft 

 < 



03 



1-3 



>> 



a 



ft 



03 



1-3 





s-1 



ft 



< 



1 



i 



l-a 



"3 

 *-> 



ft 

 < 



1 



h 



Season of 1919— Contd. 

 Martens White 

 Dent. 



14 

 14 

 14 

 14 

 14 

 14 

 14 

 14 

 14 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 



6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 



56 

 56 

 61 

 57 

 60 

 61 

 68 

 80 

 71 



42 

 40 

 47 

 43 

 50 

 51 

 60 

 65 

 61 



45 

 46 

 46 

 46 

 51 

 52 

 59 

 67 

 62 









91 

 96 

 105 

 97 

 111 

 115 

 120 

 127 

 122 



96 

 98 

 101 

 108 

 F 

 F 

 F 

 F 

 F 



6.5 

 6.5 

 7.5 

 7.0 

 8.0 

 8.2 

 8.7 

 11.0 

 9.7 



6.0 

 6.5 



7.5 

 7.0 

 8.0 

 8.7 

 8.7 

 10.2 

 9.5 



( 



U S Selection 133 









f 



Wilson White Cap. 

 Fulton 









f 









( 



U S Selection 193 











100-Day Bristol... 

 U S. Selection 120. 









f 









( 





65 

 59 







11 



U S. Selection 119. 







( 











Average (12 va- 



14 



20 



20 

 20 

 20 

 20 

 20 

 20 

 20 



10 



9 



9 

 9 

 9 

 9 

 9 

 9 

 9 



6 



6 



6 

 6 

 6 

 6 

 6 

 6 

 6 



6 



5 



5 

 5 

 5 

 5 

 5 

 5 

 5 



60 



56 



58 

 65 

 67 

 67 

 72 

 80 

 90 



47 



47 



47 

 52 

 54 



52 

 62 



68 



77 



50 



39 



40 

 43 

 46 

 43 



53 

 57 

 65 









103 



76 



79 



86 

 105 



91 

 114 

 122 



F 



e92 



7.6 



7.2 





38 



39 

 43 



49 

 44 

 50 

 57 

 66 





94 



94 

 97 

 100 

 100 



111 



121 

 133 







;Season of 1920: 



Cornforth Dent 



North western 

 Dent 



100 



100 

 109 

 113 

 112 

 119 

 125 

 130 



87 



87 

 92 

 97 

 97 

 F 

 F 

 F 



3.7 



3.7 

 6.2 

 6.2 

 6.5 

 8.2 

 9.5 

 10.5 



5.5 



5.0 

 7.0 

 6.5 

 7.5 

 9.2 

 10.2 

 10.7 





U.S. Selection 133. 



San Miguel 



Fulton 



1 



100-Day Bristol... 

 U.S. Selection 119. 



1( 



1 







Average (8 va- 



20 



9 



6 



5 



69 



57 



48 



48 



113 



106 



/96 



ff92 



6.8 



7.7 





Summary of the Data for the Years 1915, 1917, 1919, and 1920 (1916 and 1918 not Includi 



Date of seeding (on approximately the 20th of the 

 month). 



Number 



Number of days from— 









of seed- 



Seeding 



Emer- 



Emer- 



ings. 



to 



gence 



gence 





emer- 



to first 



to 





gence. 



silks. 



ripening. 



63 



17 



63 



A 112 



63 



10 



51 



ft 99 



63 



7 



45 



»93 



63 



6 



43 



7 91 



April 



May. 

 June. 

 July. 



The same 7 varieties averaged 91 days from the June seeding. 



The same 7 varieties averaged 111 and 102 days for the April and I. 



The same 5 varieties averaged 107, 97, and 87 days for the April, May, 



These 23 seedings were of the earliest maturing varieties. The same 



e Average of 7 varieties. 



/ Average of 7 varieties. 

 ings, respectively. 



9 Average of 5 varieties, 

 seedings, respectively. 



ft Data from 51 seedings. 



i Data from 69 seedings. 



j Data from 23 seeaings. 

 required 103, 87, and 85 days from the April, May, and June seedings, respectively. 



In 1919 12 varieties were grown. The dates of seeding were 

 21, May 20, June 20, and July 21. The different seedings were 

 in single rows 66 feet long and 3.3 feet apart on uniform reel 

 river land that had been cropped to corn the previous year, 

 stand of the earlier small varieties was one plant every 10 inc 

 the row and of the larger varieties one plant every 16 inches. 



