NORMAL DAY S WORK FOR VARIOUS FARM OPERATIONS. 
17 
the same proportion as the power, and in part by the apparent ineffi- 
ciency of 3-horse and 5-horse hitches and the difficulty to the aver- 
age teamster in handling them. In general, each horse was loaded 
with 2 feet in width and must harrow 2.5 to 3 acres on freshly plowed 
land and from 3 to 3.75 acres daily on well-packed land. The duty 
of each foot in width of harrow is from 1.3 to 1.5 acres daily on 
freshly plowed land and from 1.5 to 1.8 acres on well-packed land, 
assuming adequate power at the normal speed of horses. 
In Table VIII original data for the most commonly used widths 
and teams in disking are presented, together with adjusted factors 
for these widths and a scale of allowances for other widths. The 
daily duty for any team and width can be ascertained from this 
table by inspection. 
Table VIII. — A normal day's work with a disk harrow, giving the average daily acreage 
reported for the widths most frequently used and adjustments for other widths. 
[Net hours in the field, 9.65. ] 
Width of harrow. 
On freshly plowed land. 
On well-packed land. 
Num- 
ber of 
Most Har ;, 
common r °™* 
™ dth - | c£y. 
Allow- 
Har- 
Allow- 
horses. 
Range. 
Number 
Adjusted 
ance for 
rowed 
Number 
Adjusted 
ance for 
averaged. 
acreage. 
each foot 
per 
day. 
averaged. 
acreage. 
each foot 
in width. 
in width. 
Feet. 
Feet. 
Acres. 
Acres. Acres. 
Acres. 
2 
4-8 
6 
7.2 
159 
6.5 
0.50 
7.5 
147 
6.7 
0.60 
3 
5-10 
6 
7.5 
163 
6.8 
.60 
9.1 
165 
8.0 
.70 
4 
6-10 
8 
12.8 
414 
11.5 
.80 
15.4 
432 
14.0 
.90 
5 
7-10 
8 
11.3 
7 
12.0 
.85 
13.4 
7 
14.5 
.95 
6 
7-10 
8 
15.4 
16 
13.5 
1.00 
18.0 
19 
16.0 
1.10 
ROLLING WITH LAND ROLLER. 
The land roller is not an implement of heavy draft, 83 per cent of 
users finding two horses adequate for a considerable range in width. 
The 8-foot width is most generally used, while about equal numbers use 
6, 7, and 10 foot widths. Widths of 12 and 14 feet are not uncommon. 
A 3-horse team is used by 6 per cent and four horses by 8 per cent of 
farmers. Where three or four horses are used, the acreage per horse 
is slightly less than with two horses. With the 2-horse teams each 
foot in width covers less area daily than with larger teams, indicating 
that the latter move on the average somewhat more rapidly than 
two horses. With land rollers it appears to be economical to use the 
larger sizes, since more land can be covered in a given time without 
adding greatly to the work of the available horses. A width of 4 or 
5 feet is a reasonable load per horse and 5 to 7 acres daily per unit of 
power can be normally expected. The duty of each foot in width is 
from 1.6 to 1.9 acres daily. 
5774°— Bui. 3—13 3 
