CHEMICAL COMPOSITION 



369 



The following table further shows an increase in dry matter as 

 maturity advances : 



Milk Glazed Ripe Increase in 



August 2ist, September 7th, September 23d, Dry Matter. 



4,643 pounds, 7,202 pounds, 7,918 pounds, 3,275 pounds. 



Not only is there an increase in total dry matter as the period of 

 maturity advances, but the digestible materials, especially protein and 

 carbohydrates, are deposited in larger percentages, as shown by the 

 following tables : 



ALBUMINOID AND AMIDE NITROGEN OP THE MATURING CORN CROP. 

 New York (Geneva) Station. 



This table shows that there is a steady increase in the albuminoid 

 nitrogen, in digestible form, while the amide nitrogen fluctuated at the 

 different periods, but was less at time of ripening than at earlier dates. 



INCREASE OF CARBOHYDRATES IN RIPENING CORN. 

 New York (Geneva) Station. 



Of these changes, Todd writes : 



"The total starch per acre increased more than twenty-three 

 times between tasseling and harvesting, a period of 55 days. From the 

 stage of glazing corn until full ripening, the increase in dry matter was 

 716 pounds, the increase in nitrogen-free extract, 587 pounds, while 

 the increase of sugar and starch was 989 pounds, or greater by 273 

 pounds than the entire gain in crop. That is, much of the nitrogen- 

 free extract, which, at period of glazing of corn, was in the transitory 

 state, had been translocated and transformed into sugars and starch." 



Jordan studying this same subject states : 



"Owing to the relatively large production of sugars and starches 

 in the late stages of growth, a pound of the dry substance of the 



