ANIMAL PRODUCTION-POULTRY RAISING GRADE 9

1. FLOCK
UNIFORMITY

2. WHAT IS FLOCK
UNIFORMITY?

3. Uniformity indicates the
percentage of flock that falls
within a certain range of the
average flock bodyweight
(mean). This certain range is
usually ±10% of the mean.

4. So, the greater the
uniformity, the less variable
a flock is.

5. STEPS IN SOLVING THE
FLOCK UNIFORMITY

6. STEP 1
Add the weight of all birds.
300 grams
320 grams
340 grams
360 grams
380 grams
400 grams
TOTAL WEIGHT: 2100 GRAMS

7. Step 2
Get the average weight of the birds:
TOTAL BIRS :6
Divide the TOTAL WEIGHT OF ALL BIRDS to the TOTAL No. OF
BIRDS
2100 grams/6 total no. of birds= 350grams average weight

8. Step 3
Calculate the +10% or-10% range of the birds
Formula:
+10%= Average weight + (Average Weight*10)/100
-10%= Average weight – (Average Weight*10)/100
Example: +10%= 350 + (350*10)/100= 385 grams
-10%= 350 – (350*10)/100= 315 grams

9. Step 4
Find out the number of birds that within the range if
+10% and -10%
Example:
+10%= 385 grams -10%= 315 grams
300
320
340
360
380
400
= 4 birds

10. Step 5
Calculate the UNIFORMITY
Formula:
(Total of birds within the +10% and -10% range / Total No. of
birds )*100
4 birds/6 birds= 0.66666*100
Uniformity is = 66.6666 = 67%
Note: Flock Uniformity should be 80% and above , below 80% means poultry management
needs to be reviewed to ensure uniformity of flock in the farm.