SEASONAL DISTRIBUTION OF FARM LABOR, 
13 
use. It is quite possible also that the acreage plowed in July and 
August, when the ground is dry and compact, will be less than the 
figures given. 
The average disk harrow has usually 12 disks in the single and 
24 disks in the double acting harrow, from 14 to 16 inches in diam- 
eter, with a cutting surface about 8 feet wide. The spike-tooth 
harrow is usually 2 to 3 section, with a cutting surface of from 8 
to 12 feet, and the spring tooth has a cutting surface of from 6 to 
8 feet in width. The plank drag is usually made with three planks 
overlapping, and the man usually rides. Following a deep-working 
harrow the drag is an excellent tool for leveling and breaking clods. 
Table IV. — Crews and duty of machinery in cultivating and harvesting corn {average of 
24 farms). 
Operation. 
Crew. 
Men. 
Acres 
covered 
in 
10-hour 
day. 
Days per acre. 
10-hour day. 
Men. Horses. 
9-hour day. 
Men. Horses. 
Planting (2-row machine) 
Weeding 
Spike-tooth harrow 
Cultivating 1 
Cutting: 
50-bushel yield 
60-80-bushel yield 
80 bushels and over 
Husking: 
50-bushel yield 
60-80-bushel yield 
80 bushels and over 
Hauling grain 
Do 
Hauling stalks 
Do 
Filling silo: 2 
Cutting by hand and loading. 
Hauling to cutter 
Feeding the cutter 
Storing in silo. . .^- 
Running engine 
10.50 
18.00 
13.00 
7.70 
1.25 
1.00 
.85 
.74 
.53 
.44 
2.20 
3.20 
5.00 
6.50 
4.00 
0.11 
.06 
.80 
1.00 
1.18 
1.35 
1.80 
2.27 
.45 
.62 
.40 
.45 
3.50 
0.21 
.06 
.16 
.90 
.62 
.40 
.30 
2.00 
0.11 
.06 
.15 
1.11 
1.32 
1.50 
2.09 
2.53 
.50 
.70 
.44 
.51 
0.22 
.16 
.30 
1.00 
.70 
.44 
.34 
\ This operation is usually performed 4 times. 
2 Average yield of silage corn, 12 tons per acre. 
Table IV gives crews and duty of machinery as the average on 24 
farms for planting, cultivating, and harvesting corn. Planting is 
usually done with a 2-row planter. The figures used do not include 
the drilling of fertilizer in the row at the time of planting, which 
consumes extra time, and allowance should be made in the acreage 
planted where fertilizer is applied. The figures for spike harrowing 
in this table are for harrowing after planting. 
Field corn is usually checked 3| feet each way by most of these 
farmers, though a number of good corn growers are planting in drills. 
Silage corn is planted either in drills or in hills. No figures were 
obtained for hand planting, as the 2-row planter is universally used. 
Corn is cut and shocked by hand except where it is to be put in the 
