60 INDIAN CORN CULTURE. 
applied in 1883 and again in 1854, amounting 
for the two years to about 50 tons per acre. 
No manure has been used in this experiment 
before or since the two years named. The ἂν- 
erage results of the 11 years of cropping have 
shown a yearly gain of 10.42 bu. of corn per 
acre for the manured plats over those unma- 
nured. 
In other experiments at Purdue, in charge of 
Prof. Latta who conducted the preceding one, 
fresh horse manure has always given greater 
returns from its application than artificial fer- 
tilizers, singly or in combination. Both six 
and nine tons of the manure per acre gave 
larger yields than where fertilizers were used 
under any circumstances. 
At the Connecticut station for four years a 
comparison has been made of the influence of 
cow manure, hog manure, and fertilizer-chem- 
icals upon a corn crop grown continuously on 
the same land.* The yields from plats given 
cow and hog manure in excess of the exhaus- 
tion by cropping have been essentially the same 
during the four years, averaging, however, 
slightly in favor of the hog manure. The fer- 
tilizer plat, which received more nitrogen, 
phosphorie acid and potash than the crop re- 
moved, gave about four-fifths as much dry 
* Connecticut State agricultural experiment station, Re- 
port for 1893, p. 286. 
