399 



results of tltose analyses and of calculations based on them are stated 

 in tables, which give the composition of the water-free substance of corn 

 and stover, proximate ingredients in corn and in stover per acre, and 

 gain or loss in amounts of each ingredient as compared with the 

 unfertilized plats. 



■Effect of fertilizers upon the percentage and number of pounds of protein 

 in the crop. — Tabular statements show the maximum, minimum, and 

 average percentages of protein in corn and stover from differently 

 fertilized plats and those receiving no fertilizers ; the same from plats 

 with and without nitrogen, the pounds per acre of i)rotein in corn and 

 stover raised on differently fertilized plats, and calculations of the 

 pecuniary gain with fertilizers as compared with no manure, based on 

 the American and the German values per i)ound of protein, fat, and 

 nitrogen-free extract. 



Relation of corn to cob and tvater. — The ratio of corn -to cob in the 

 partly dried sample is given for SI samples ; the ratio of water-free 

 corn to cob and water in the sample at harvest for 71 samples; together 

 with the maximum, minimum, and averages for the whole. 



The percentage of water-free corn at harvest in the diifereut samples varies from 

 45.3 per cent to 64,1 per cent, a range of nearly 20 per cent. This means that in the 

 one case 100 pounds of ears would yield 45.3 i>ouuds of water-free corn or 50.3 pounds 

 of corn with average percentage of water, and in the other case 64.1 pounds water- 

 free or 71.3 pounds corn with average percentage of water. Especial pains were 

 taken to harvest the crop from which these samples were obtained, in dry weather, 

 and probably much greater differences would be noticed in corn harvested in the 

 ordinary manner. 



Albuminoid and non-albuminoid nitrogen in corn and stover. — " The 

 albuminoid nitrogen was determined in samples from three of the field 

 experiments of 1888 by the method of Stutzer." In the 28 sami)les 

 analyzed the albuminoid nitrogen in the corn varied from 90.96 to 100, 

 and averaged 95.26 per cent of the total nitrogen 5 and that in the stover 

 varied from 74.36 to 100, and averaged 86.44 per cent of the total nitro- 

 gen. " The results indicate, as would be expected, a much wider range 

 of non-albuminoid nitrogen compounds in stover than in corn. It does 

 not api>ear that the fertilizers had any marked efi'ect on the percentage 

 of non-albuminoid nitrogen." 



Froximate composition of corn and stover. — The results of analyses 

 given in previous tables are summarized in a tabular statement, show- 

 ing the maximum, minimum, and average percentage composition of 

 the corn and stover from the plats in eight experiments, and the same 

 data for 81 samples. These averages for corn and those compiled by E. 

 H. Jenkins* are combined in a table showing the average composition 

 of flint corn grown in New England. 



Snmmary. — Tlie author summarizes the results of the experiments as 

 to the eftect of fertilizers upon the percentage and total amount of 



* Connecticut State Station Report for 1888, p. 92. 



