STANDARD DAYS WORK IN CENTRAL ILLINOIS. 
11 
per cent of these 4-section harrows have sections 5 feet wide, mak- 
ing a total width of 20 feet. 
Table IX. — Spike-tooth harrow (4 horses, once over, no lap). 
Number oi 
sections. 
Width of 
sections. 
Number of 
reports. 
Acres per day. 
Average. 
Acreage most often 
reported. 
3 
3 
4 
4 
4 
4 
Feet. 
5 
G 
4 
4} 
5 
51 
61 
23 
96 
63 
166 
13 
33.0 
36.5 
39.3 
37.2 
40.6 
41.9 
/30 (18 reports). 
\40 (20 reports), 
40 (12 reports). 
40 (53 reports). 
40 (34 reports). 
40 (93 reports). 
40 (5 reports). 
The acreage covered per day increases with the increase in width 
of the harrow, but not directly in proportion to it. While the larger 
harrows are most efficient from the standpoint of both man and 
horse labor, the 20 and 22 foot harrows cover on the average only 
2 and 1.9 acres per day per foot of width, respectively, while the 
15 and 16 foot harrows cover 2.2 and 2.4 acres per day per foot of 
width. 
Out of 422 reports summarized in this table, 217 gave 40 acres as 
an average day's work. However, very few men using the smaller 
sizes reported over 40 acres, while 15 per cent of those using the 20 
and 22 foot sizes said that on an average they covered 50 acres per 
day. 
PLANTING CORN. 
Except where the fields are small and irregular in shape, nearly 
all the corn in this region is checked, so that it can be cultivated in 
both directions. The 2-row planter with check-rower attachment is 
used universally for this work, about one-half of the farmers making 
the rows 40 inches apart and the remainder 42 inches. (See Table 
X.) Theoretically the amount of ground covered per day when the 
rows are 42 inches apart should be about 5 per cent greater than 
when the rows are 40 inches apart, but the figures show that on the 
average there was practically no difference on these farms„ 
Table X. — Planting corn with check rower. 
Width of 
row. 
Number of 
reports. 
Acres per day. 
Average. 
Acreage most often 
reported. 
Inches. 
40 
42 
259 
267 
18.0 
17.8 
20 (105 reports). 
20 (90 reports). 
