132 STORRS AGRICULTURAL EXPERIMENT STATION. 
In the following tabulation are shown the tctal vields of 
the various food ingredients, and the percentage difference ~ 
between the yield of dry matter and of protein from the nitro- 
gen plots and the unfertilized plots and that from the mineral 
plots. The figures given here are the averages given in bold 
face type in Table 26, page 164 
From Table ro it will be seen that the increase in the total 
yield of protein was relatively much larger than the increase 
in the total yield of dry matter. For if the yields from the 
plots upon which mineral fertilizers only were used be taken 
as a basis, the relative yields from the plots upon which 25, 50, 
and 75 pounds of nitrogen were used in addition to the 
minerals, were respectively as follows: of dry matter, 137, 
177, and 188 per cent.; of protein, 127, 188, and 222 peiecent. 
This brings out clearly the fact that the increase in the amount 
of protein obtained by the use of nitrogenous fertilizers is due 
not only to the increase in the total yield of the crop, but also 
to the higher percentages of protein in the composition of the 
crops from the plots upon which the larger quantities of nitro- 
gen were used. For example, the yield of dry matter from the 
plot upon which 75 pounds of nitrogen were used was only 
TI per cent. greater than the yield from the plot upon which 50 
pounds were used ; while the percentage of protein in the crop 
from the former plot was 34 per cent. greater than that in the 
crop from the latter plot; showing that the nitrogen in the 
fertilizer had a relatively greater tendency to increase the 
TABLE 10.— Lffects of nitrogeneous Sertilizers upon yield of prox- 
percentages of yields of dry matter and protein trom the 





Plot No. Kinds and amounts of fertilizers per acre. paris 2 
lbs. 
0, 0O Nothing, : . ‘ : 5 : Gaile Chee 5 
Dissolved boneblack, . : , : ; 320 
say a Muriate of potash, : ; : ; 160 5 
Dissolved boneblack, : ‘ : eye so 
7, 10 Muriate of potash, J . : : : 160 3 
| ( Nitrogen, P ‘ 3 ; ; 4 : 25 
| ( Dissolved boneblack, . ‘ : ; A 320 
Ss Il Muriate of potash, . ; : : : 160 3 
Nitrogen, ; ‘ : : : : : 50 
( Dissolved boneblack, , : : : 320 
9, 12 ~ Muriate of potash, . : : 5 : , 160 
| { Nitrogen, : : ‘ : , : oe Ne 
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