EXPERIMENTS OF THE BUKEAU OF PLANT INDUSTRY. 25 



Fig. 8. — Map showing the distribution of the corn-cultivation experiments in the various States. 

 Table V. — Relative grain yield by States. 



State. 



Number 

 of exper- 

 iments. 



Average 

 yield of un- 

 cultivated 

 plats ex- 

 pressed as 

 percentage 

 of culti- 

 vated. 



State. 



Number 

 of exper- 

 iments. 



Average 

 yield of un- 

 cultivated 



plats ex- 

 pressed as 

 percentage 



of culti- 

 vated. 



Arkansas 



1 

 2 

 1 

 4 

 1 

 1 

 8 

 9 

 7 

 9 

 4 

 3 

 1 

 7 

 1 



77.4 

 86.8 

 90.1 

 98.8 

 87.1 



138.8 

 94.74 



105. 36 



102. 72 

 91.28 



105.8 

 77.9 



109.2 



116. 26 



100 





3 

 1 



10 

 4 

 2 



10 

 2 

 1 



12 

 2 

 8 

 9 

 2 



103.2 







101.9 



Colorado 





112.71 







104.7 







92. 15 



Georgia 



Ohio 



96. 17 







99.3 







89.6 







99.07 



Kentucky 



Tennessee 



89.4 







92.59 



Maine 





88.51 







77.9 





Total . . 







125 











RELATIVE MATURITY OF CULTIVATED AND UNCULTIVATED CORN. 



In 1909, 1910, and 1911 the cooperators were asked to report which 

 of the two plats or sets of plats matured first. Note of this matter 

 was made by 68 of them, 39 of whom reported no difference in the 

 date of ripening, while 10 stated that the cultivated plats ripened 

 first and 19 stated that the uncultivated plats were first to ripen. 

 The average grain yield from the uncultivated plats expressed as a 

 percentage of the yield from cultivated plats in these three groups is 

 approximately 100 per cent for the first two groups and 95.58 per 



257 



