I24 STORRS AGRICULTURAL EXPERIMENT STATION. 
TABLE 5.— Vields of hay with fertilizers supplying mineral tn- 
ytelds with mineral fertilizers alone, 




ae Kinds and amounts of fertilizers per acre. 
lbs 
O Nothing, . : : : : : : 5 > A eeteae eer 
{ Mixed minerals, as plot 6a, . . : i } ; 480 
( Nitrate of soda (25 Ibs. nitrogen), : , : 160 
3 Mixed minerals, as plot 6a, . : : : : ’ 480 i 
Nitrate of soda (50 lbs. nitrogen), 4 ‘ : : 320 
Mixed minerals, as plot 6a, . 2 : ; ; : 480 t 
9 } Nitrate of soda (75 Ibs. nitrogen), ; ; : 480 ; 
Dissolved boneblack, f : { 320 
Ga Muriate of potash, t mixed minerals, i 160 § 
te Mixed minerals, as plot 6a, . “ : ; - " 480 t 
Sulphate of ammonia (25 Ibs. nitrogen), ; } : 120 
r 1 Mixed minerals, as plot 6a, . : : 480 
Sulphate of ammonia (50 Ibs. nitrogen), : ; : 240 
ae 1 Mixed minerals, as plot 6a, . ‘ : : ; : 480 
Sulphate of ammonia (75 lbs. nitrogen), : . ; 360 
00 Nothing, . : : ; : : : : en nee, 5 = 
66 Mixed minerals, as plot 6a, . : ; ; ' : 480 


* Total value, less cost of fertilizer. 
Effects upon Yields of Corn. — Between the years 1878 
and 1881, a large number of field experiments with corn were 
conducted, under the supervision of one of us (W.. (Onae 
upon farms, mostly in New England. The results of 
these experiments, together with those of a large number of 
other field experiments with fertilizers, were summarized in a 
publication by the United States Department of Agriculture, 
entitled “ Results of Field Experiments with various Fertil- 
izers.” During the years 1888 and 1889, the Station also 
carried on some field experiments with this crop. The object 
of these experiments was to study the effects of different 
quantities of nitrogen in the fertilizers upon the yields of the 
crop. The results with regard to the effect upon the yields of 
shelled corn are briefly summarized on the following page by 
the averages of the yields from all the experiments in which the 
conditions were similar. 
Four soil tests and eight special nitrogen experiments, 
comprising 168 plots, were carried out with corn between 
1888 and 1896. The results of the nitrogen experiments, with a 
valuation of the increase in yield following the use of different 

