174 



Starch content of tubers of different plants of the same sorts during different years. 



An examination of the above table will show among other things, that 

 in the year 1910 the starch content of Magnum Bonum ranged from 17-1% 

 in plant 2 to 18-2% in plant 4, or a difference of ! 1%, while in Wohltmann 

 the variation was considerably greater namely, from 18-8% in plant 4 to 

 22 5% in plant 12 or a difference of 3-7% 



Not only have differences in the starch content of tubers from different 

 plants been discovered but distinct deviations nave been noted in the tubers 

 produced in the same hill. The accompanying table shows the weight and 

 per cent starch of each of the tubers produced by single plants belonging 

 to four different sorts grown in 1910 (23 p. 95.). Differences between 

 the different plants in regard to starch content may again be noted here : 



