34 STORRS AGRICULTURAL EXPERIMENT STATION. 
FIELD EXPERIMENTS WITH FERTILIZERS. 
1 il Oe a oats 8 Fy So 

Two classes of field experiments with fertilizers, one known 
as ‘‘soil tests’’ and the other as ‘‘special nitrogen’’ experi- 
ments, were undertaken by the Station soon after its organiza- 
tion in 1888, and have been continued until the present. The 
policy has been to repeat these experiments with the same 
fertilizers on the same plots. year after year, in the belief that 
the results would thus continually increase in value. Other 
field experiments have also been added at different times since 
these were begun. Those now in progress include the follow- 
ing: 
I. Special nitrogen experiments on corn, cow peas, and soy 
beans, for the purpose of studying the effects of nitrogen in 
different quantities and combinations in the fertilizers upon 
the yields and the composition of the crops. 
2. A rotation soil test on the Station land, for the purpose 
of studying the deficiencies of the soil and the needs of different 
crops for the different ingredients of fertilizers. 
3. Experiments with grasses and other forage crops, mainly 
for the purpose of comparing the feeding values of different 
fodder crops, and of studying the effects of the nitrogen in the 
fertilizers upon the proportion and amount of protein in the 
different crops. 
4. An experiment on soil improvement, for the purpose of 
comparing the relative economy of (1) stable manure, (2) a 
‘“complete’’ chemical fertilizer, and (3) green manures alone 
and in connection with mineral fertilizers for improving a 
soil apparently deficient in organic matter and in available 
nitrogen. 7 
Detailed results of investigations of each year have been pub- 
lished in the annual reports of the Station; and from time to 
time summaries of the results of the experiments of several 
