Agricultural Science English Paper 1 2015 Questions and Answers Part 1

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Section A

Question 1

D ⎫⎫



A ⎫⎫


D ⎫⎫


C ⎫⎫

A ⎫⎫

D ⎫⎫ (10 x 2) (20)

Both A and B ⎫⎫

B only ⎫⎫

A only ⎫⎫

None ⎫⎫

B only ⎫⎫ (5 x 2) (10)

Biological value/BV ⎫⎫

Zinc/Zn ⎫⎫

Plywood ⎫⎫

Oogenesis/ovigenesis ⎫⎫

Reproductive ⎫⎫ (5 x 2) (10)





Embryo transfer (5 x 1) (5)

Total Section A: 45

Section B

Question 2

Animal Nutrition

Alimentary Canals of Two Farm Animals

Type of digestive systems represented by:

  • Ruminant

  • Cattle/cows/sheep/goat/game

  • Non-ruminant/monogastric animal

  • Pig

Letter and name where hydrochloric acid is secreted in diagram A:

  • D

  • Abomasum/true stomach/milk stomach

Planning Fodder Flow Feed Flow and Fodder Flow Production

Definition of fodder flow:

  • A strategic plan

  • To ensure enough fodder

  • To meet the requirements of all the animals

  • Throughout the year

  • In terms of quality and quantity (Any 2)

Aspects in planning for a fodder flow:

  • Economic viability: The farmer to take measures of ensuring that the fodder is cost effective/cheap

  • Sustainability: Planning to ensure that the fodder is always available to livestock

Digestibility Co-Efficiency

Calculation of digestibility co-efficiency:

or %

Implication of the Answer in Question

The bulk of the feed (62,35%) is digested and absorbed by the heifer


The lesser percentage of the feed (37,65%) was not digested hence not absorbed by the heifer

A Table on the Nutritive Ratio (NR)

The ration most suitable for the following:

  • Fattening of old ewes – A

  • Ewes in the last 4 weeks of pregnancy – B

  • Young growing animals – B

Reason for the ration in 2.4.1(a):

  • Ratio is wide

  • Feed has higher lipid/carbohydrate/energy content

  • Feed has lower protein content

  • Ewes need more energy than protein (Any 1)

Ration with high levels of:

  • Maize – A

  • Fish meal – B

The implication of the nutritive ratio of ration B:

  • Ration has higher protein content

  • Recommended for growth, production and reproduction

  • Ration has lower lipid/carbohydrate/energy content (Any 2)

Diagram on Mineral Supplements

Method of mineral supplement:

Mineral lick

Two minerals that could be supplemented:




Nitrogen (Any 2)

The partial protein substitute:

Non-protein nitrogenous substance (NPN)/biuret/urea

Role of growth regulators:

  • Hormones – will stimulate metabolic reactions⎫ that will lead in increased growth rate

  • Antibiotics – will provide immunity⎫ thereby increasing resistance to diseases

Question 3

Animal Production, Protection and Control

Animal Production Systems

Identification of animal production systems:

  • A: Extensive production system

  • B: Intensive production system

Comparison of the Two production systems:

  • Capital investment – Low capital/technology input in extensive production system and large capital/technology input in intensive production system

  • Area/space of land occupied – Low animal concentration in a large area in extensive production system and high animal concentration in a small area in intensive production system

Two examples of intensive production system:

  • Cage

  • Battery (layers/broilers)

  • Deep litter system (Any 2)

Structures/Practices for Handling Animals

  • A single strand of movable electrical wire

  • A rope with a halter to tie animals to a pole

  • A separate crush

  • Single strand of movable electric wire

Scenario on Solar Radiation

Three measures to reduce heat stress under intensive conditions:

  • Spray/Fugger with water

  • Insulation

  • Fans/conditioners/ventilators

  • Housing systems/orientation (Any 3)

Correlation between high environmental temperature and feed consumption:

  • The higher the temperature

  • the less the feed intake

Data on Average Body Temperature and Pulse Rate in Dairy Cows

Line graph on the volume of stimulant and the growth response:

The Line graph

The Line Graph

Loading image

Line graph of growth stimulants against growth response Criteria/marking guidelines:

  • Correct heading

  • Y-axis – correct labelling (growth response)

  • X-axis – correct labelling (volume of growth stimulants)

  • Correct units

  • Accuracy/correct plotting

  • Line graph