EFFECTS OF MUTILATING THE SEEDS OF CORN. 



Table I. — Data from the seed-mutilation experiments at Waco, Tex., Rockville, Md. 

 and Rosslyn, Va., in 1917, 1918, and 1919. 



Averages of Data from Waco, Rockville, and Rosslyn, 1917-1919. 





Ratio of 

 actual to 

 possible 



stand 

 (per 



cent). 



Time 

 from 

 emerg- 

 ence to 

 shedding 

 of first 

 pollen 

 (days). 



Number 

 of plants 

 at har- 

 vest. 



Ears harvested. 



Yield p 

 (pou 





Locality and seed 

 planted. 



Weight (pounds). 



Number. 



nds). 



Total. 



Average. 



Total. 



Per 



plant. 



As har- 

 vested. 



Correct- 

 ed to 

 check. 



At Waco, Tex., in 

 1917:« 

 Check 



98 



78 



39 



8 



0.210 



38 



0.976 



0.205 



0.180 







Do 



56 

 97 

 95 

 93 

 99 

 57 

 63 

 99 



88 

 45 

 43 

 95 

 79 

 79 

 91 

 67 

 51 

 91 



99 

 78 

 73 

 98 

 95 

 95 

 99 

 83 

 92 

 97 



80 



78 

 78 

 78 

 78 

 80 

 80 

 78 



64 

 69 

 68 

 63 

 65 

 65 

 60 

 66 

 66 

 60 



33 

 48 

 38 

 44 

 49 

 42 

 36 

 48 



49 

 29 

 25 

 45 

 43 

 47 

 39 

 39 

 46 

 45 



42 

 48 

 45 

 45 

 48 

 50 

 43 

 42 

 45 

 44 



48 

 46 

 48 

 48 

 46 

 49 

 47 

 47 

 46 

 44 



6 

 9 

 6 

 6 

 9 

 5 

 5 

 7 



33.7 

 17.5 

 15.5 

 28.0 

 17.0 

 18.0 

 17.7 

 20.7 

 18.0 

 31.0 



.182 

 .191 

 .167 

 .171 

 .209 

 .147 

 .161 

 .167 



.614 

 .500 

 .517 

 .667 

 .378 

 .464 

 .680 

 .543 

 .474 

 .586 



33 



47 

 36 

 35 

 43 

 34 

 31 

 42 



55 

 35 

 30 

 42 

 45 

 39 

 26 

 38 

 38 

 53 



1.000 

 .980 

 .948 

 .796 

 .878 

 .810 

 .862 

 .876 



1. 121 



1.206 



1.154 



.934 



1.046 



.830 



.667 



.974 



.826 



1.177 



.182 

 .187 

 .158 

 .136 

 .184 

 .119 

 .139 

 .146 



.689 

 .604 

 .620 

 .622 

 .395 

 .383 

 .454 

 .531 

 .391 

 .689 



.170 



Check 



.180 







Do 



c.143 



Check 



.180 







Do 



c . 141 



Check 



.180 



At Rockville, Md., 

 in 1917:<* 

 Check 



.614 



Dehulled 





Do 



c. 576 



Check 



.614 







Do 



c. 445 



Check 



.614 







Do 



c. 504 





.614 



At Rockville, Md., 

 in 1918: e 

 Check/ 





Dehulled 





19.0 

 15.5 

 21.5 

 20.0 

 25.0 

 21.0 

 16.5 

 18.5 

 25.5 



47.7 

 41.1 

 39.0 

 41.3 

 43.1 

 39.4 

 47.2 

 41.8 

 40.0 

 46.0 



.453 

 .443 

 .615 

 .540 

 .569 

 .568 

 .485 

 .440 

 .567 



.994 

 .857 

 .780 

 .844 

 .918 

 .838 

 .926 

 .836 

 .870 

 .940 



42 

 35 

 35 

 37 

 44 

 37 

 34 

 42 

 45 



48 

 48 

 50 

 49 

 47 

 47 

 51 

 50 

 46 

 49 



.875 

 .778 

 .778 

 .770 

 .880 

 .860 

 .810 

 .934 

 1.023 



i: 000 

 1.043 

 1.041 



1.021 

 1.021 

 .960 

 1.085 

 1.065 

 1.000 

 1.114 



.396 

 .345 

 .478 

 .417 

 .500 

 .489 

 .393 

 .411 

 .580 



.994 

 .894 

 .813 

 .860 

 .938 

 .804 



1.005 

 .890 

 .870 



1.045 





Do 





c. 384 



Check 





.516 









Do 





c. 489 



Check 





.516 









Do 





c. 402 



Check 





.516 



At Rosslyn, Va., in 

 1919:<7 

 Check 



65 

 68 

 68 

 66 

 66 

 66 

 66 

 69 

 69 

 66 



.976 



Dehulled 







Do 





c. 898 



Check 





.976 









Do 





c.913 



Check 





.976 



Germs 







Do 





c. 837 



Check 







.976 









Class of seed. 



Time from 

 emergence 



to shed- 

 ding of first 

 pollen 



(days). 



Number 



of ears per 



plant. 



Weight 



per ear 



(pounds). 



Yield per plant 

 (pounds). 



Yield per 



acre 



As 

 harvested. 



Corrected 

 to check. 



(bushels). ft 



Check 



68 

 72 

 70 

 72 



0.961 

 1.012 

 .906 

 .910 



0.585 



.485 

 .506 

 .495 



0.571 

 .504 

 .466 



.468 



0.572 

 .506 

 .497 

 .467 



57.2 



Dehulled 



50.6 





49.7 





46.7 







« Seed planted Mar. 14, plants emerged Mar. 24, harvested Aug. 13, 1917. 



6 Stand destroyed by rodents. 



c Average of the corrected yields of two rows. 



d Seed planted May 18, plants emerged May 28, harvested Nov. 1, 1917. 



c Planted June 6, plants emerged June 12, harvested Nov. 5 and 6, 1918. 



/ Through an error this row was not harvested. 



s Seed planted May 17, plants emerged May 27, harvested Oct. 6, 1919. 



h Calculated on the basis of a stand of 7,000 plants per acre and 70 pounds of ears per bushel. 



