1
AGRICULTURAL SCIENCES
Grade 12
Practical Investigation
Topic: Animal Nutrition
Cognitive Levels:
1, 2, and 3
DATE: ....................................................................
NAME: ....................................................................................................................................................
SECTION A
Instructions: The learners will be divided into groups by the facilitator. Each group will be provided with
five different types of feeds/supplements. The group must identify each type of feed/supplement and
categorize it according to the table provided below.
(20)
Time:
Feed
Number
1
2
3
4
5
Identify Feed
Choose: Protein/
Carbohydrates/
Minerals
Choose:
Concentrate/
Roughage/
Supplement
55 minute(s)
Briefly describe use of feed
2
SECTION B
Questions:
1.
20 kg of a feed with a moisture content of 10% is ingested and 16 kg manure with a moisture
content of 50 % is excreted by a farm animal. Determine the coeffisient of digestibility of this feed
and identify the possible feed that was used in this digestibility trial from the list of feeds in the
additional information sheet.
(8)
2.
By making use of the Pearson square method determine the ratio in which feeds numbered 2 and
4 should be mixed to satisfy the needs of farm animals that require a Crude Protein (CP) value of
18%. Make use of the nutritional information supplied in the attached additional information
sheet.
(7)
3.
Use the available information and give a complete outlay of the feed composition of feed number
5.
(5)
4.
Identify a feed from the list provided on the information sheet that would be the most suited to
use in each of the following cases:
5.
4.1
A supplement to increase the crude protein value of the feed mixture on a cost effective way
4.2
A roughage with a very high protein content
4.3
A component of a lick which is given to supplement phosphorus and calcium minerals
4.4
A feed with a the lowest nutritional value
4.5
A feed from animal origen which is used as a protein source
(5)
Study the label attached to this practical investigation. Describe the danger that this type of feeds
poses to livestock. Suggest possible precautions that may limit these posible dagerous effects. (5)
[50]
Additonal information:

In question 1 all the digestible nutrients of the feed was digested by the animal and

See the information sheet attached to this Practical investigation
3