52 STORRS AGRICULTURAL EXPERIMENT STATION. 
of dry matter and of protein from the sections supplied with 
nitrogen are compared with those from the sections supplied 
with only mineral fertilizers, there appears to be very little 
increase in either total food materials or protein following 
the use of nitrogen in the fertilizer. In one of the experi- 
ments of the past six years there seemed to be a slight increase 
in the proportion of protein following an increase in the quan- 
tities of nitrogen used, but the increase in that case was not at 
all regular; and in other years there has been no apparent 
increase. Altogether, the experiments with cow peas grown 
for fodder seem to indicate that the nitrogen of the fertilizer 
has little influence upon the proportions of nitrogen, and thus 
of protein, in the crop. 
EXPERIMENTS WITH SOY BEANS. 
Soy beans were grown on the two series of sections indicated 
by the letters B and E in the diagram above. The results on 
these two series have been combined in the tables beyond as if 
one series of one-twenty-fifth acre sections had been used. In 
the experiments with soy beans only the seed is taken into 
account. No attempt was made to estimate the yields of vines 
or straw, because as the seeds matured the leaves drop from 
the plants and become scattered before the time of harvesting 
the seed. 
The amounts and costs of fertilizers per acre, the yields of 
seed per section as harvested and the estimated yields per acre 
are given in Table 14. The percentages and amounts of dry 
matter in the seed and the percentages and amounts of protein 
in the dry matter are given in Table 15. 
The amounts of nitrogen in the fertilizer and the total yrelds 
in the crop.—The results given in Table 14 indicate the effect 
of the nitrogen of the fertilizer upon the total yield. The 
smallest yield was from the sections of the two plots without 
fertilizer. On the sections of the plots with the mineral fer- 
tilizers alone the yields were considerably larger; that from 
sections of plot 64, however, was a third larger than that from 
the sections of plot 6a. This difference in yield of soy beans 
from these two plots has been noticeable throughout the 
series of experiments, suggesting that the soy bean sections of 
plot 6a may be somewhat less fertile than the corresponding 

