72 INDIAN CORN CULTURE. 
is to continue for a term of years. Where the 
plowing was 10 and 12 inches deep a subsoil 
plow followed after the common plow and 
loosened to the necessary depth. The results 
of this work, as given by Prof. W. C. Latta,* 
are as follows: 
BUSHELS PER ACRE FROM DEEP AND SHALLOW PLOWING. 
: Ἐν aS >» | Average of 
Depth of plowing. 1891. | 1892. | 1893. | ~ years. 
πα AS AME ει Oa ete ΓΝ 40:9 1:9. 0} 161 39.48 
τον ἐνὶ εὐ τ τες ν ἐπ 5 ck oes tye pcos 49.1 | 58.9 | 13.6 40.54 
BAREMCH Ss bc. ΕΑ ete 49.8 | 60.0 | 17.1 42.28 
PAP ACCS Ss Socata ον ΡΟΝ 49.6 | 59.7 | 17.0 41.76 
5 42.01 
Techies is) te. Jo oh ee ee | 46.7 a te We 
Excessive drouth in 1895 accounts for the low 
yields of that year. The deeper plowings gave 
the best returns, with that of eight inches 
slightly in the lead. 
According to the tenth census of tle United 
States,y on the basis of the question, “How 
deep is the soil usually plowed for corn?” the 
great majority of the answers from the leading 
corn-producing States were from six to eight 
inches, some being as low as five and a very 
few as high as nine. In a further consider- 
ation of this subject Prof. brewer says:{ “In 
* Bulletin 50, Vol. V, Purdue University agricultural ex- 
periment station, April, 1894, 
7 Tenth Census of the United States. Report of the Pro- 
ductions of Agriculture, Washington, 1883, p. 98. 
t 1014. 
