EFFECT OF NITROGENOUS FERTILIZERS. I3I 
have been omitted in computing the averages of analyses. 
The following table shows the average percentages of the 
various food constituents in the hay of mixed grasses. The 
figures are those in bold face type in Table 25, page 162, giving 
details of the analyses of this crop for the three years. 
From Table 9g it will be seen that the percentage of protein 
in the hay crop increased quite uniformly with the increase in 
the quantities of nitrogen in the fertilizers. For example, in. 
the crops from the plots (6a and 6b) upon which the mineral 
fertilizers were used alone, the proportion of protein was 7.83 
per cent.; in the crop from plot 7, with 25 pounds of nitrogen 
per acre in addition to the minerals, the proportion of protein 
was 7.95 per cent. ; in the crop from plot 8, with 50 pounds of 
nitrogen per acre in the fertilizer, the proportion of protein 
was 8.46 per cent.; and in the crop from plot 9, to which 75 
pounds of nitrogen per acre were applied, the proportion of 
protein was 9.42 per cent. It will be noticed also that the 
effect of the nitrogen in the fertilizer upon the proportion of 
protein in the crop was much the same, whether the nitrogen 
was supplied in nitrate of soda or in sulphate of ammonia. 
upon the composition of hay of mixed grasses. 











AVERAGE PERCENTAGE OF PROXIMATE CONSTITUENTS IN 
HAY, CALCULATED ON WATER-FREE SUBSTANCE. 
pies = ; Plot No. 
n : 1: 
: | Protein. Hae ae Pere | Fiber. Ash. 
‘Per cent.|Per cent.) Per cent. |Per cent.|Per cent. 
. 9 7-29 «| 3267 52.62 31.44 174208 0, 00 
10 | 7.83 3.44 50.84 32.32 | 5.57 |= 6a. 68 
5 7-95 3.62 49.62 33-36 | 5.45 7 
3 8.46 3.05 48.56 S4008 «9324-1925 8 
5 9.42 3.68 47.96 33.64 | 5.30 9 
4 7.50 3.60 49.94 33.62 | 5.34 10 
4 8.46 4.29 48.51 33.40 5.34 EY 
4 9.36 272 48.608 | 32.91 5423 iz 
| : | 
