This question was poorly attempted by the candidates. Most of the candidates could not calculate the feed efficiencies for the 10 weeks to complete the table as required in 4(a). Majority of the candidates could neither state which week the layers were most efficient nor the week the layers were least efficient in converting feed to eggs as required in 4(b-c). Most of them also, could not calculate the overall average feed efficiency for the 10 weeks as required in 4(d) but majority of them could state what would be the effect on feed efficiency if palm kernel cake was replacedwith fish meal in the diet of the layers as required in 4(e).
The expected answers include:
4.(a)Calculation on feed efficiency for 10 weeks and completion of table
Week |
Total Eggs Laid |
Total Feed Consumed (kg) |
Feed Efficiency |
1 |
80 |
10.0 |
1.250 |
2 |
100 |
12.0 |
1.200 |
3 |
120 |
15.5 |
1.292 |
4 |
140 |
16.9 |
1.207 |
5 |
160 |
18.0 |
1.125 |
6 |
180 |
18.5 |
1.028 |
7 |
195 |
19.8 |
1.015 |
8 |
220 |
20.0 |
0.909 |
9 |
235 |
22.3 |
0.949 |
10 |
245 |
23.0 |
0.939 |
Week 1 - 10.0 = 0.125 x 10 eggs
 80 (1.25)
Week 2 - 12.0 = 0.120 x 10 eggs
 100 (1.20)
 Week 3 - 15.5 = 0.129 x 10 eggs
120 (1.29)
Week 4 - 16.9 = 0.121 x 10 eggs
 140 (1.21)
 Week 5 - 18.0 = 0.1125 x 10 eggs
160 (1.13)
Week 6 - 18.5 = 0.103 x 10eggs
 180 1.03
 Week 7 - 19.8 = 0.102x 10 eggs
195 (1.02)
Week 8 - 20.0 = 0.091x 10 eggs
 220 (0.91)
Week 9 - 22.3 = 0.095x 10 eggs
235 (0.95)
Week 10 - 23.0 = 0.094x 10 eggs
 245 (0.94)
(b) Most efficient week is week 8.
(c) Least efficient week is week 3.
(d) Overall feed efficiency is
Total Feed = 176 kg.
Total Eggs = 167.5
Feed Efficiency = 176
 167.5 = 1.051 |
