ing in daily output from 20.90 to 348.37 tons establish the respective 

 volumes for the six distribution firms studied. The six mill models are 

 equivalent in output to models A, B, C, D, E, and F in the previous sec- 

 tion. These mills supply broiler and breeder feed to coordinated or- 

 ganizations producing from 1.25 to 20.80 million broilers a year.2 For 

 purposes of identification, each feed distribution firm has the same letter 

 designation as the mill it serves. Table 13 gives the volumes of feed dis- 

 tributed by the six firms. 



Three levels of poultry production density are considered.^ These 

 densities expressed in terms of feed are equivalent to distributing 1.31, 

 6.55. and 32.73 tons per square mile per year. 



The broiler producing area of each firm is a circle with the feed 

 mill located at the center and production units scattered uniformly 

 throughout. The size of the area is a function of firm volume and pro- 

 duction density. For each firm, the producing area has a specific number 

 of square miles and radius for each density level. The sizes of the areas 

 and radii are given for each firm in Table 13. 



Increasing the volume distributed with density held constant re- 

 quire? a proportionate increase in area. This is illustrated in Figure 4. 

 The circular production area for each of the six firms are superimposed 

 in order of size. The result is a circle enclosed by five bands. The basic or 

 primary circle represents the poultry producing area for Firm A. Mov- 

 ing out from the center, each distribution area in effect adds a band 

 representing the area that must be added with each successive increase 

 in firm size and output. This geometric arrangement provides the frame- 

 work for investigating feed distribution by the added cost approach. The 

 tons of feed delivered into each band annually are given in Table 13. 



Poultry production is assumed to be uniformly scattered through- 

 out the area of each band in producing units. The average of the loca- 

 tions of these units is on a line of determinable radial distance that 

 divides a band into two equal parts with respect to area. The radial or 

 airline distance from the mill location to the line of average location in 

 each band for each density level is derived and given in Table 13. 



The relationship between radial distance and road mileage depends 

 on the road net-work concentration in the producing area. For purposes 

 of determining this relationship, Concord, New Hampshire, was selected 

 as the center. The radial distance and road mileage to a number of ran- 



- See Appendix Table A-1. 



3 Broiler production densities are 1,052, 5,263, and 26,216 pounds of finished 3.5- 

 pound live broilers produced per square mile per year. Hatching eggs are produced 

 at equivalent density levels. Three such density levels were used in previous reports 

 in this series: for broiler production. Ibid.; for hatching eggs, C. R. Burbee and E. 

 T. Bardwell, Marketing New England Poultry: 6. Economies of Scale in Hatching and 

 Cost of Distributing Broiler Chicks, University of New Hampshire, Agricultural Ex- 

 periment Station Bulletin 483, May 1964; and for all spatial activities, C. R. Burbee, 

 E. T. Bardwell, and W. F. Henry, Marketing New England Poultry: 8. Effects of Firm 

 Size and Production Density on Spatial Costs for an Integrated Broiler Marketing 

 Firm, University of New Hampshire, Agricultural Experiment Station Bulletin 485, 

 November 1964. However, in those three reports the work year was set at 247 days, 

 rather than the 260 days used in this report, so production density levels were lower 

 on a yearly basis in the previous three reports. 



32 



