MACHINERY COST OF FARM OPERATIONS. 
21 
Table XIX. — Corn binders — relation of work done annually to service and cost per acre 
and per day used on 458 farms. 
1 to 15. 
16 and 
over. 
233 
10.1 
11.0 
111.1 
19 
225 
32.5 
10.6 
344.5 
60 
21.2 
10.8 
227.9 
40 
$125. 00 
15.73 
45.00 
$125. 00 
28.20 
42.46 
$125. 00 
Total cost of repairs duringlife 
21.92 
43-28 
185. 73 
195. 66 
190. 20 
Cost of corn binder: 
$9.78 
1.67 
$3.24 
.568 
$4.76 
Per acre cut 
.83 
The replacement cost averages $0.55 per acre and the interest 
charge at 6 per cent is $0,194 per care. 
The corn hinder requires an expenditure of $0,096 per acre for 
repairs, or about $0.50 for each day used. About 17| per cent 
must he added to its original cost for repairs during its life. 
RELATION OF ANNUAL REPAIRS TO FIRST COST. 
In making farm plans for the years to come, it is often desirable 
to know what the normal relation is between the first cost of an im- 
plement and the annual repairs which must be provided for. Table 
XX has been prepared for the purpose of affording data of this char- 
acter for the implements discussed in this bulletin. The sizes of 
implements shown in the first column of the table are the same as 
the averages for the corresponding implements in Tables II to XIX. 
The first cost in the second column is taken from farm inventories 
recorded in the western New York area. The third column of the 
table shows the percentage of the first cost that must, on the average, 
be laid out annually for repairs for each implement. 
The fourth column is the average present value of the respective 
implements that would be obtained by making an inventory valua- 
tion and computing the average. 1 The fifth column shows the per- 
centage of the present value that must be laid out for repairs annu- 
ally to keep each machine in running order. 
1 The fourth column of the table represents the average investment upon which the farmer must earn 
interest at the borrowing rate in his locality where he charges off for depreciation annually a part of the 
first cost in proportion to the average life of his respective implements. This average investment is iden- 
tical with the average present value that would be obtained by making an inventory valuation of the 
same implements and computing the average. The relation of first cost to average farm value of machinery 
in use is shown on page 5 for equipment having average life ranging from 1 to 20 years. 
