NORMAL DATS WORK FOR VARIOUS FARM OPERATIONS. 
27 
SPRAYING. 
The averages for the spraying of fruit trees are shown in Table 
XXVI by the number of men in the crew for both hand-power and 
gasoline-power equipment. Striking increases in the number of trees 
sprayed are shown for each addition to the force of men in the crew, 
the other conditions for each type of sprayer being comparatively 
uniform. Greater numbers of trees are reported for the respective 
crews with the hand-power type than with the sprayer operated by 
gasoline engine, but the size of the trees for the hand-power equip- 
ment is seen to be very much less. In the same table the data for 
both types of sprayer have been consolidated by height and spread 
of trees. Increased height is accompanied by a corresponding spread 
and distance between trees and a reasonably uniform decrease in the 
number of trees sprayed, the crews being practically the same. 
There are, of course, many variations in the construction of spraying 
equipment which affect this operation, such as number of nozzles, 
leads of hose, pressure used, and type of sprayer. In a more detailed 
investigation averages in terms of gallons per day or hour, as well 
as other useful factors, could be made available. Since it was not 
practicable to cover all of these features in a general inquiry of this 
kind, further observations are necessary to secure exhaustive data. 
Table XXVI. — A normal day's work with an orchard sprayer, giving the average number 
of trees sprayed daily. 
[Net hours at work, 9.6.] 
SPRAYING BY DESIGNATED CREWS. 
Type of sprayer. 
Number 
Number 
Capacity 
Height of 
Spread of 
of trees 
of men. 
of tank. 
trees. 
trees. 
sprayed 
per day. 
Gallons. 
Feet. 
Feet. 
1 
250 
25 
28 
110 
2 
180 
20 
19 
191 
3 
196 
20 
21 
252 
1 
50 
18 
13 
54 
2 
57 
20 
19 
134 
3 
68 
18 
16 
305 
Number 
averaged. 
Gasoline power. 
Hand power . . . 
NUMBER OF TREES SPRAYED ACCORDING TO THEIR HEIGHT. 
Height of trees. 
Average 
spread. 
Number 
of men. 
Number 
of trees 
sprayed 
per day. 
Number 
averaged. 
12 feet or less 
Feet. 
11 
17 
26 
2.4 
2.3 
2.2 
329 
182 
129 
33 
13 to 20 feet 
83 
Over 20 feet (average 28.23) 
51 
Limited data for spraying field crops planted in rows with a knap- 
sack sprayer and with a horse-drawn field sprayer are reported in 
Table XXVII. Knapsack sprayers and poison dusters are used on 
