78 INDIAN CORN CULTURE. 
There is no gain found in frequent cultiva- 
tion, but instead a shght loss. This loss may 
be due to excessive root-pruning. Where corn 
was cultivated, however, once in three and 
once in four weeks a material loss in yield oc- 
curred. It would appear that three to four 
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FIG. 21.—STANDARD RIDING CULTIVATOR WITH SIX SHOVELS. 
cultivations a season, according to circum- 
stances, might be recommended as a general 
rule, 
Depth of cultivation should be shallow 
rather than deep. The roots of the corn plant, 
while penetrating several feet below the top of 
the ground, are essentially surface feeders. At 
