A<;i!i<jur/njHAL experiment station. 



si 



TABLE XIII. 



RELATION OF DIFFERENT CLASSES OF COMPOUNDS IN COKN CUT AT DIFFERENT 

 PERIODS OK GROWTH. 



In 100 pounds of gnu 'ii corn : in rut. 







GO Q}4J 



C be 2 



C C r 1 



fiflli 



o d •* 



'Set fc,i " 

 C O ^ o ? 



Lot cut August loth, very immature. 



August 28th 



September 4th .. 



September 12th 



September 21st, mature 



LI. 71 

 17.50 

 19.55 

 23.17 

 25.34 



5.46 

 9.71 

 11.08 

 14.50 

 16.04 



6.25 



7.79 

 7.87 

 8.67 

 9.30 



Lot cut August 15th Other compounds: Nitrogen-free-extract :: 100: S7.3 



Lot cut August 28th Other compounds: Nitrogen-free-extract:: 100:124.6 



Lot cut September 4th Other compounds: Nitrogen-free-extract : : 100:148.4 



Lot cut September 12th Other compounds : Nitrogen-free-extract : : 100:167.2 



Lot cut September 21st . . .Other compounds : Nitrogen-free-extract : : 100:175.4 



The answer to our question must be, then, that the changes which 

 are shown in the experiment with Maine field corn to be due to 

 increasing maturity are those which exactly explain the differences 

 between the two varieties of corn compared. 



It seems impossible to avoid the conclusion that the inferiority 

 of the larger Southern corn, when compared pound for pound with 

 our smaller Northern variety, is caused in part, at least, by the 

 necessity of harvesting it in an immature condition. 



TO THE FORMATION OF WHAT COMPOUNDS IS DUE THE LARGE RELA- 

 TIVE INCREASE OF NITROGEN-FREE-EXTRACT AS THE CORN PLANT 

 APPROACHES MATURITY. 



As before stated an attempt has been made to extend these 

 analyses beyond the usual routine. This has been in the way of 

 determinations of the sugars and starch, in order to learn the extent 

 to which these more valuable carbohydrates are present in the corn 

 plant, and the influence of certain conditions upon their amount. 



