EFFECT OF DATE OF SEEDING ON CORN. 



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

 ment of corn, in experiments conducted at Arlington Experimental Farm, near Wash- 

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



[The symb ol F indicates that the crop was killed by frost before reaching maturity. In 1918 the first 

 (April) seeding, delayed by weather conditions, was actually made on May 7.] 









Number of days from — 































Height of plants 























Name of variety. 



Seeding to emer- 1 

 genee. 



Emergence to 

 first silks. 



Emergence to 

 ripening. 





(ieet;. 









& 



© 



i^, 



• 



>> 



<c 



t^ 





fcA 



o5 



>> 





s^ 



a 



t^ 





ft 

 < 



1 



*-i 



£ 



ft 



3 







ft 

 < 



£ 



^ 



3 



H-5 





£ 



i-a 



3 



Hi 



Season of 1915: 



































North western 



































Dent 



12 



12 



10 



8 



50 



41 



33 



33 



99 



82 



82 



96 



5.5 



5.5 



4.5 



5.5 



Brown County 





Yellow 



11 



12 



12 

 12 



10 

 10 



8 

 8 



50 

 50 



43 



45 



35 

 37 



33 



41 



99 

 107 



82 

 86 



83 

 85 



96 



98 



6.3 

 7.0 



6.3 

 7.3 



5.3 

 7.5 



5.7 



U.S. Selection 133. 



7.5 



Minnesota 13 



I? 



12 



10 



8 



50 



45 



36 



37 



107 



86 



85 



98 



7.0 



7.3 



7.0 



7.5 



Martens White 



































Dent 



13 



12 



10 



8 



53 



46 



37 



42 



107 



86 



85 



98 



5.7 



6.3 



6.5 



6.0 



Rustler White 





Dent 



12 



12 



10 



8 



50 



41 



33 



35 



105 



82 



79 



96 



5.0 



5.2 



5.2 



6.0 



Australian White 





Flint 



12 

 13 



12 

 12 



10 

 10 



8 

 8 



51 

 41 



47 

 39 



37 



30 



40 

 31 



112 



104 



90 

 80 



88 

 78 



93 



6.5 

 3.7 



6.0 

 4.0 



5.7 

 4.0 



6.0 



Gehu Yellow Flint. 



3.5 



Disco 90-Day 



12 



12 



10 



8 



53 



48 



39 



41 



110 



86 



85 





6.0 



6.0 



5.5 



6.0 



Disco 85-Day 



14 



12 



10 



8 



50 



46 



37 



37 



107 



82 



85 



98 



5.3 



5.0 



4.7 



5.0 



Blue Squaw Flour. 



13 



12 



10 



8 



41 



39 



31 



31 



99 



80 



76 



91 



4.0 



4.2 



4.5 



3.5 



Idaho Flint 



16 



14 



10 



8 



56 



45 



39 



41 



112 



86 



85 





4.7 



5.2 



5.0 



5.7 



Corn forth Dent 



14 



12 



10 



8 



50 



43 



33 



31 



105 



82 



78 



V 



5.2 



5.2 



5.0 



5.7 



Early Huron 



15 



12 



10 



8 



58 



51 



40 



41 



112 



90 



90 



F 



6.5 



6.2 



6.2 



7.2 



Rocky Mountain 



































Dent 



16 

 16 



12 

 12 



10 

 10 



8 

 8 



56 

 56 



48 

 51 



39 

 40 



41 

 41 



112 

 112 



90 

 93 



88 

 88 



F 

 F 



7.2 

 5.5 



6.2 

 5.7 



6.7 

 6.5 



7.0 



Stickney Flint 



6.0 



Fairfield Yellow 



































Dent 



16 

 13 



12 



12 



10 

 10 



8 

 8 



57 

 50 



51 

 52 



39 

 41 



41 

 41 



114 

 117 



90 

 93 



88 

 92 



F 

 F 



6.2 

 7.0 



6.2 

 6.2 



7.5 

 7.5 



7.0 



U.S. Selection 193. 



7.0 



Davis Yellow Dent 



14 



12 



10 



8 



58 



54 



44 



43 



118 



93 



92 



F 



7.5 



8.7 



9.0 



7.2 



Wilson White Cap . 



12 



12 



10 



8 



54 



49 



39 



41 



112 



90 



88 



F 



7.2 



8.0 



8.5 



7.2 



Long Island Yel- 



































low Dent 



14 



12 



10 



8 



58 



52 



41 



43 



117 



93 



88 



F 



6.7 



8.0 



7.5 



6.7 



Woods Northern 



































White Dent 



13 



12 



10 



8 



60 



57 



46 



45 



119 



98 



93 



F 



6.5 



8.2 



7.5 



7.0 



100-Day Bristol . . . 



13 



12 



10 



8 



61 



58 



46 



47 



117 



101 



93 



F 



8.2 



8.5 



8.7 



7.0 



U.S. Selection 119. 



14 



12 



10 



8 



70 



66 



53 



51 



121 



106 



102 



F 



9.0 



9.5 



10.2 



8.0 



Average (24 va- 



































rieties) 



13 



12 



10 



8 



54 



48 



39 



40 



110 



89 



87 



a96 



6.2 



6.4 



6.5 



6.3 



Season of 1916: 



















North western 



































Dent 



15 



9 





V 



54 



48 





35 



89 



84 





79 



5.0 



4.0 





4.0 



Brown County 





Yellow 



15 

 16 



9 

 9 





7 

 7 



55 



58 



49 



52 





32 



38 



89 

 103 



95 

 97 





79 

 83 



5.0 

 6.5 



4.0 

 4.0 





4 



U.S. Selection 133. 



4.7 



Minnesota 13 



16 



9 





7 



60 



49 





35 



103 



99 





83 



6.5 



4.0 





4.7 



Martens White 



































Dent.. 



16 



9 





7 



60 



53 





43 



103 



98 





83 



5.5 



3.0 





4 3 



Rustler White 





Dent 



15 

 16 



9 

 10 





7 

 7 



53 

 55 



48 

 52 





35 

 38 



89 

 106 



99 

 103 





83 

 83 



3.5 

 6.3 



3.0 

 4.5 





4 (1 



Disco 90-Day 



4.3 



Disco 85-Day 



16 



10 





7 



58 



51 





38 



105 



101 





83 



4.0 



3.7 





5.3 



Fulton 



16 

 15 



9 



9 





7 

 7 



60 

 55 



50 



48 





41 

 31 



107 

 89 



105 

 105 





88 

 88 



5.3 



5.0 



4.0 

 4.0 





•4. 5 



Cornforth Dent 



4.7 



Early Huron 



16 



9 





7 



66 



61 





40 



107 



108 





93 



5.7 



3.5 





5.5 



Rocky Mountain 



































Dent 



16 



9 





7 



69 



63 





45 



107 



112 





F 



6.0 



4.3 





6 3 



Fairfield Yellow 





Dent 



16 

 16 



9 

 9 





7 

 7 



68 

 69 



53 

 63 





41 



48 



107 

 114 



115 

 114 





F 

 F 



5.7 

 5.7 



4.5 

 4.5 





6 7 



U.S. Selection 193. 



6.3 



Davis Yellow Den1 



16 



9 





7 



71 



64 





41 



118 



115 





F 



6.0 



4.5 





6.5 



Wilson White Cap 



16 



9 





7 



69 



63 





40 



107 



112 





F 



5.5 



5.0 





6.7 



Long Island Yel- 





































16 



9 





7 



69 



64 





49 



119 



115 





F 



5.5 



4.7 





5.3 



Woods Northern 



































White Dent 



16 



9 





7 



75 



66 





50 



122 



113 





F 



6.0 



4.5 





6.0 



100-Day Bristol . . . 



16 



9 





7 



75 



63 





50 



133 



133 





F 



6.0 



5.0 





6.5 



o Average of 9 varieties that matured. The same 9 varieties from the April, May, and June seedings 

 averaged 104, 83, and 81 days, respectively. 



68201°— 21— Bull.' 1014 2 



