Page 141 - Calculating Agriculture Cover 20191124 STUDENT - A

CH 12] Calculating Agriculture 12-11

You might question the comparison of the number of eggs to the number of hen-days, since they are
different denominate numbers. Essentially, the number of hen-days represents the total possible number of
eggs, so we are really comparing the actual number of eggs to the possible number of eggs.

Example B: What is the percent of egg production for a flock of 345,000 hens that produced 9,090,750
eggs during the month of May? (a) Calculate the number of hen-days and (b) what is the
Percent production?

Solution:
(a) Hen-Days

Birds Days Hen-Days
345,000 31 (May) 345,000 x 31 = 10,695,000 hen-days
EXPLINATION
Hen-Days = # of hens x # of days

Hen-Days = 345,000 hens x 31 days

Hen-Days = 10,695,000 hen-days
12
(b) Percent Production = (# eggs ÷ hen-days) x 100%

Percent Production = ( 9,090,750 ÷ 10,695,000 ) x 100%

= (0.85) x 100%

Percent Production = 85.0 %

Adding hens and subtracting hens. In computing Percent egg production for a given pen during
any given month, the computation of hen-days must be done with care. Pullets are added to the laying flock
and dead birds are removed. It is an issue of inventory in the flock and these changes effect the percent of
production.

Example: On March 1 a pen contained 200 birds. Four birds died on the 12th of the month; 10 birds
were added the 16th of the month. What was the percent production for the pen if 3,852 eggs
were laid?

Solution:
Birds Days Hen-Days
200 31 (March) 200 x 31 = 6,200
add: 10 15 (31-16) 10 x 15 = 150
6,350

Subtract: 4 (12-1=11)
20 (31-11) 4 x 20 = - 80
Total 6,270 hen days

Percent Production: 3,852 eggs produced = ? % of 6,270 hen-days

3,852/6,270 = 0.614 or 61.4% production

(b) Percent Production = (# eggs ÷ hen-days) x 100%

Percent Production = (3,852 ÷ 6,270) x 100%

= (0.614) x 100%

Percent Production = 61.4 %

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