60 INDIAN CORN CULTURE. 



applied in 1883 and again in 1884, 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 av- 

 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 acorn 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, 

 phosphoric 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. 



