FARM PEACTICE IF THE CULTIVATION OF CORN. 
ii 
Table IV. — Normal average acreage per farm and yield per acre of various crops 
on the farms surveyed in twenty-one regions of the United States — Contd. 
Region covered (fig. 1). 
Cotton. 
Rye. 
Potatoes. 
Tobacco. 
Pas- 
ture 
and 
all 
other 
crops. 
g 
>> 
County and State. 
Per 
farm. 
Yield 
per 
acre. 
Per 
farm. 
Yield 
per 
acre. 
Per 
farm. 
Yield 
per 
acre. 
Per 
farm. 
Yield 
per 
acre. 
Per 
farm. 
A 
Tipton, Ind 
Acres. 
Pounds. 
Acres. 
Bushels. 
Acres. 
Bushels. 
Acres. 
Pounds. 
Acres. 
21.9 
B 
Montgomery, Ohio . . 
6.0 
1,004.8 
9.5 
C 
Mercer, N. J 
13.1 
20.6 
17.5 
147.8 
14.1 
D 
Moultrie, 111 . 
45.7 
E 
Tama, Iowa 

17.6 
F 
Kalamazoo, Mich 
28.0 
G 
Maury, Tenn 
1 
3.3 
1.0 
3.2 
13.2 
18.3 
16.5 
100.5 
H 
Hartford, Conn 
1.4 
151.9 
8.3 
1, 799. 
20.3 
I 
Bradford, Pa 
36.1 
J 
Christian, Ky 
27.3 
936.0 
47.9 
K 
Hamilton, Nebr 
34.0 
L 
Rockwall and Gray- 
son, Tex. 
Scotland, N.C 
Augusta, Va 
90.7 
98.6 
720.0 
1,328.0 
7.5 
M 
23.9 
N 
55.4 
O 
Waushara, Wis . . 
30.3 
12.3 
is. 2 
110.4 
25.9 
P 
Bates, Mo 
19.6 
Q 
Alexander, N. C 
Oklahoma, Okla 
Pike, Ala 
8.5 
12.5 
94.8 
75.2 
794.2 
580.5 
862.5 
704.8 
8.1 
8.6 
29.8 
R 
30.7 
s 
37.2 
T 
Holmes, Miss 
23.3 
u 
11.0 
SUBSOILING, DRAINAGE, AND TILLAGE BEFORE PLOWING. 
Subsoiling is the process of breaking up or loosening the subsoil 
without mixing it with the topsoil. This is usually done by plowing 
a furrow with an ordinary turning plow (fig. 2) and following in 
the bottom of this furrow with a shovel or bull-tongue plow, which 
loosens the subsoil but does not bring it nearer the surface or mix 
it with the topsoil. In some sec- 
tions partial subsoiling is prac- 
ticed by running a subsoil plow 
in the bottom of the corn row 
before planting the corn, as is 
the practice in Scotland County, 
N". C, and Pike County, Ala. 
The results of subsoiling pre- 
sented in Table V clearly show 
that this practice is not extensive and is usually carried on only in 
regions which have soils low in organic matter. 
The amount of data available in regard to subsoiling is so limited 
that no definite conclusions can be drawn. Table V presents a digest 
of the opinions of farmers concerning the effect of subsoiling on the 
crop yield, showing the percentage of those who have practiced it, 
the season when it is usually done, and the average depth. Opinions 
were recorded from some farmers who had not practiced subsoiling. 
Fig. 2. — A 2-horse turning plow, a type of im- 
plement used throughout the corn-growing 
States. 
