13


for the corn grain example are

 Line No. Col. 8 Col. 16
 August Item
 (43) Combine 1. 16.
 (44) Truck .25 10.

These entries indicate that a 14 foot combine is used once in August,

along with one-fourth hours for a 2 ton truck.


Machinery Complement Changes (Part 7)

 As noted previously, there are 15 possible machinery complements--

each with up to 100 machines. The first 29 machines in each complement

are self-propelled, while the remaining 71 are pull-type implements.

Furthermore, the first nine machines are the tractors of the complement.

 Each machine has associated with it 16 coefficients, so that the

machinery complement may be viewed as a matrix of 100 rows and 16 columns.

The first column contains the code number of the machine, corresponding

to the row number of the machine in the complement. The second column

is the width of the machine for all machines except tractors and trucks.

For tractors, the appropriate entry in this column is the horsepower

rating of the tractor and for trucks it is the weight rating. Thus, for

a half-ton pick-up the appropriate entry is .5 for column two. The third

column is the initial list price of the machine, not to be confused with

the purchase price. The fourth column contains the average speed at

which the machine is operated, while the fifth column is estimated field

efficiency [I].

 Columns 6,7 and 8 contain the coefficients used to compute repair

 costs for the machine [1], while columns 9 and 10 are the annual hours of

 use and expected years that the machine is owned. Columns 11 and 12