Page 138 - Calculating Agriculture Cover 20191124 STUDENT - A

12-8 Poultry Science CH 12]

b) # birds x Space/bird
Number of feeders = —————————
Feeder Circumference

1,600 x 2”/bird
Number of feeders = ———————
38” / feeder

3,200”
= —————
38”/ feeder

= 84.21 round up

b) Number of feeders = 85 feeders

Cost = Quantity x price per unit
= 85 x $16.99
Cost = $1,444.15

c) # birds x Space/bird
Number of waterers = —————————
Waterers Circumference

1,600 x 2”/bird
Number of waterers = ———————
24” / waterer

3,200”
= —————
24”/ waterer

= 133.33

c) Number of waterers = 134 waterers

Cost = Quantity x price per unit
= 134 x $7.95
Cost = $1,065.30

Mortality rates

Raising birds in confinement bring many influences that increase mortality rates which include,
water purity, feed quality and protein, disease, and pests, cannibalism and panic reactions which cause
birds to pile up and suffocate, crushing those on the bottom of the pile. All of these issues require
management for each bird that dies. It is an expense to the farm that must be accounted for and
mitigated.

Table 12.5 Average Annual Mortality rates

Class Mortality %

Fryers & Broilers 3% - 5%
Pullets 2% - 4%

Layers in production 5% - 6%
Turkeys for Meat 8%

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