MACHINERY CAPACITY ESTIMATOR

DRB 8/00

PART 1: Capacity of a machine

Speed 5 mph

Width 9 feetField Efficiency 0.80 decimal

Capacity 4.36 acres/hour  

PART 2: Capacity needed to get the job done

 Area to cover 150 acres

Probability of a working day 30 %

Hours for this work 8 h/day

Window of opportunity 14 days

Capacity needed 4.5 acres/h

SELECT A MACHINEFROM THIS LIST SELECT A WIDTH

(feet)

SELECT A SPEED:

Low

Typical

SELECT A FIELD EFFICIENCY

Low

Typical

High

 

High

 

187015298.xlsx.ms_office

Inputs

Php tractor power 100 100 hp

Ny length of time to keep the tractor 5 7 years

H use of tractor each year 500 500 hours

i interest or discount rate 0.080 0.080 decimal/y

PF price of fuel 1.20 1.20 $/gal

TIH taxes, insurance, and housing 0.02 0.02 fraction of purchase price/y

Intermediate

P list purchase price of tractor 66900 66900 $ function fit to current price data

RV remaining value of tractor at end of period 49.1 43.5 % ASAE D 497 function

SV salvage value in Ny years 32828 29101 $ RV/100*P

PV present value of price less SV 44558 49920 $, today P-SV/(1+i)^Ny

RM repair & maintenance cost 633 1288 $, today sum from table below

F average fuel consumption 4.38 4.38 gal/h ASAE D 497 function

L lubrication consumption 0.027 0.027 gal/h ASAE D 497 function

FC fuel cost 2628 2628 $/y F*H*PF

PL price of lubricant 4.80 4.80 $/gal 4*PF, assumed

LC lubricant cost 64 64 $/y L*H*PL

TIH2 taxes, insurance, and housing 1338 1338 $/y TIH*P

Output

 AC cost for the tractor, without fuel & lube 12,656 11,174 $/y PMT(i,Ny,-PV-RM)+TIH2

FLC fuel and lubricant cost 2,692 2,692 $/y FC+LC

HCtot hourly cost for the tractor 30.70 27.73 $/hour (AC+FLC)/H

HCnf hourly cost for the tractor, no fuel & lube 25.31 22.35 $/hour AC/H

SCtot specific cost for tractor power 0.307 0.277 $/hph HCtot/Php

SCnf specific cost for tractor power, no fuel & lube 0.253 0.223 $/hph HCnf/Php

SCtot2 specific cost for tractor power -- model 0.296 0.259 $/hph 112*Php^0.109*Ny^-0.392*H^-0.848*i^0.22*PF^0.094

SCnf2 specif ic cost for tractor power -- model, no fuel & lube 0.243 0.210 $/hph 200*Php^0.122*Ny -0.437*H^-0.958*i 0.244

Publication Reference:Buckmaster, D.R. 2003. Benchmarkingtractor costs. Applied Engineering In

 Agriculture. 19(2):168-171.

tractor cost

 

TABLES OF DATA FROM ASAE STANDARDS D497

Field Efficiency, speeds, and repair factorsFld. Eff. (low) Fld. Eff. (typ) Fld. Eff. (high) Speed (low) Speed (typ) Speed (high) Estimated life Total life R&M

Machine (%) (%) (%) (mph) (mph) (mph) (hours) cost (%) RF1 RF21 (Coulter) chisel plow 70 85 90 4 5 6.5 2000 75 0.28 1.42 2 wheel drive & stationary 12000 100 0.007 2

3 4 wheel drive & crawler 16000 80 0.003 24 Air-carrier sprayer 55 60 70 2 3 5 2000 60 0.2 1.65 Bean puller-windrower 70 80 90 4 5 7 2000 60 0.2 1.66 Beet topper/stalk chopper 70 80 90 4 5 7 1200 35 0.28 1.47 Boom-type sprayer 50 65 80 3 6.5 7 1500 70 0.41 1.3

8 Combine 60 65 75 2 3 5 2000 60 0.12 2.39 Combine (SP) 65 70 80 2 3 5 3000 40 0.04 2.1

10 Corn picker sheller 60 65 75 2 2.5 4 2000 70 0.14 2.311 Cotton picker (SP) 60 70 75 2 3 4 3000 80 0.11 1.812 Fertilizer spreader 60 70 80 5 7 10 1200 80 0.63 1.313 Field cultivator 70 85 90 5 7 8 2000 70 0.27 1.4

14 Forage blower 1500 45 0.22 1.815 Forage harvester 60 70 85 1.5 3 5 2500 65 0.15 1.616 Forage harvester (SP) 60 70 85 1.5 3.5 6 4000 50 0.03 217 Forage wagon 2000 50 0.16 1.6

18 Grain drill 55 70 80 4 5 7 1500 75 0.32 2.119 Heavy-duty disk 70 85 90 3.5 4.5 6 2000 60 0.18 1.720 Large rectangular baler 70 80 90 4 5 8 3000 75 0.1 1.821 Large round baler 55 65 75 3 5 8 1500 90 0.43 1.822 Moldboard plow 70 85 90 3 4.5 6 2000 100 0.29 1.8

23 Mower 75 80 85 3 5 6 2000 150 0.46 1.724 Mower (Rotary) 75 80 90 5 7 12 2000 175 0.44 225 Mower-conditioner 75 80 85 3 5 6 2500 80 0.18 1.626 Mower-conditioner (rotary) 75 80 90 5 7 12 2500 100 0.16 227 Mulcher-packer 70 80 90 4 5 7 2000 40 0.16 1.328 Potato harvester 55 60 70 1.5 2.5 4 2500 70 0.19 1.4

29 Rectangular baler 60 75 85 2.5 4 6 2000 80 0.23 1.830 Roller-packer 70 85 90 4.5 6 7.5 2000 40 0.16 1.331 Rotary Hoe 70 80 85 8 12 14 2000 60 0.23 1.432 Rotary Tiller 70 85 90 1 3 4.5 1500 80 0.36 2

33 Row crop cultivator 70 80 90 3 5 7 2000 80 0.17 2.234 Row crop planter 50 65 75 4 5.5 7 1500 75 0.32 2.135 Side delivery rake 70 80 90 4 6 8 2500 60 0.17 1.436 Spring tooth harrow 70 85 90 5 7 8 2000 70 0.27 1.437 Sugar beet harvester 50 60 70 4 5 6 1500 100 0.59 1.338 Tandem disk harrow 70 80 90 4 6 7 2000 60 0.18 1.7

39 Wagon 3000 80 0.19 1.340 Windrower (SP) 70 80 85 3 5 8 3000 55 0.06 2

Remaining Value CoefficientsMachine type C1 C2 C3

Balers 0.8520 0.1010 0.0000Combines 1.1320 0.1650 0.0079Disks 0.8910 0.1100 0.0000

Farm tractor, large (>112 kW,150 hp) 0.9760 0.1190 0.0019Farm tractor, medium (60-112 kW, 80-150 hp) 0.9420 0.1000 0.0008Farm tractor, small (<60 kW, 80 hp) 0.9810 0.0930 0.0058Manure Spreaders 0.9430 0.1110 0.0000Miscellaneous equipment 0.9430 0.1110 0.0000Mowers 0.7560 0.0670 0.0000

Other harvest equipment 0.7910 0.0910 0.0000Other tillage equipment 0.8910 0.1100 0.0000Other vehicles 0.7860 0.0630 0.0000Planters 0.8830 0.0780 0.0000Plows 0.7380 0.0510 0.0000Skid-steer loaders 0.7860 0.0630 0.0033

Swathers 0.7910 0.0910 0.0000