AGRICULTURAL SCIENCES
PAPER 1 (P1)
GRADE 12 
NSC PAST PAPERS AND MEMOS
SEPTEMBER 2016

MEMORANDUM

SECTION A 
QUESTION 1 
1.1

1.1.1 C √√ 
1.1.2 B √√ 
1.1.3 A √√ 
1.1.4 A √√ 
1.1.5 D √√ 
1.1.6 A √√ 
1.1.7 C √√ 
1.1.8 B √√ 
1.1.9 A √√ 
1.1.10 D √√     (10 x 2) (20) 

1.2

1.2.1 None √√ 
1.2.2 B only √√ 
1.2.3 A only √√ 
1.2.4 B only √√ 
1.2.5 Both A and B √√   (5 x 2) (10) 

1.3

1.3.1 Pancreas √√ 
1.3.2 Stock density √√ 
1.3.3 Virus √√ 
1.3.4 Impotence √√ 
1.3.5 Concentration √√ (5 x 2) (10) 

1.4

1.4.1 Urea √ 
1.4.2 Conduction √ 
1.4.3 Mesoderm √ 
1.4.4 Posture √ 
1.4.5 Bulbo-urethral/Cowpers gland √ (5 x 1) (5) 

TOTAL SECTION A: 45 

SECTION B 
QUESTION 2: ANIMAL NUTRITION 
2.1

2.1.1 Non-ruminant/monogastric √ (1) 
2.1.2 Single/Simple stomach/Monogastric √ (1) 

2.2

2.2.1 C √ (1)
2.2.2 D √ (1)
2.2.3 F √ (1)
2.2.4 I √ (1)
2.2.5 E √ (1) 

2.3

2.3.1 It is highly soluble than biuret. √ (1)
2.3.2 Avoid keeping the lick in rain. √ (1) 
2.3.3 ∙ A mixture of 2 kg urea and 20 kg molasses be sprayed on grazing √ ∙ Use of premixed fodders/mixtures/stock licks √ (2)

2.4

2.4.1

• • Only abomasum is functioning √
  • Rumen/reticulum/omasum still underdeveloped √
  • Oesophogal groove transport milk to the abomasum √ (Any 2 x 1) (2)

2.4.2 When the calf starts eating solid food/starts grazing √ (1) 
2.4.3

• • Enable to digest cellulose √
  • Hydrolyse protein √ 
  • Synthesis of vitamins √ 
  • Synthesis of amino acids √ (Any 2 x 1) (2) 

2.5

2.5.1 DE of 5 kg DM intake = Gross Energy – energy lost in faeces
= 92,5 J – 42,5 J√ 
= 50 J √ (2) 

2.5.2 Nett energy = Metabolic energy – Energy lost as heat 
Metabolic energy = 50 J – 18,5 J = 31,5 J √ 
Nett energy = Metabolic energy – Energy lost as heat 
= 31,5 J – 9 J √ 
= 22,5 J √ 

(3) 

2.6

Percentage of feed mixture 
Ratio of Maize meal : peanut oilcake meal = 22 : 7,5  
22 + 7,5 = 29,5 √ 
% of peanut oilcake meal = (7,5 / 29, 5) × 100  √ 
= 25, 42% √ (3) 

2.7

2.7.1

Concentrate requirement =    kg/day 
= 42 kg/cow/day √ 
= 42 kg × 30 days × 100 cows √ 
= 126 000 kg (126 tons) √ (3) 

2.7.2

Feed supply = 650 kg × 30 × 6 = 117 000 kg √ 
Feed required = 100 × 60 kg × 30 = 180 000 kg p/month × 6 
= 1 080 000 kg √ 
= Feed supply – Feed required 
= 117 000 kg –1 080 000 kg 
= -963 000/1 000 √ 
= -963 tons √ (4) 

2.7.3 Not enough √ - pasture has a shortage of 963 tons √ (2)

2.8 

2.8.1 Tranquillisers √ (1) 
2.8.2 Antibiotics √ (1)

[35]

QUESTION 3: ANIMAL PRODUCTION, PROTECTION AND CONTROL 

3.1

3.1.1

A Feeding shed √ 
B Holding pen √ (2) 

3.1.2

(a) Holding pen / B √ (1)
(b) Feeding shed / A √ (1) 

3.1.3

Related Items

• Give cows time to pick up their calves before moving √
• Cows and calved should be moved slowly √
• Avoid trying to work cows and calves with dogs √ (3)

3.2

3.2.1 To warn animals of your presence √ (1)
3.2.2 Makes them feel insecure √ (1)
3.2.3 Allow animals to establish social groups √ (1) 

3.3

3.3.1 D √ (1)
3.3.2 C √ (1)
3.3.3 A √ (1)
3.3.4 B √ (1) 

3.4 

3.5

3.5.1

A Chronic √ 
B Very sudden/develops within an hour/weeks √ 
C Acute √ 
D Deadly √ (4)

3.5.2 Anthrax √ (1) 
3.5.3

• • Burn the carcass √ 
  • Do not cut open the animal carcass √ 
  • Burry carcass deep in the ground √ (Any 2 x 1) (2)

3.6

3.6.1 Nasal worm √ (1) 
3.6.2

(a) C √ (1)
(b) A/B √ (1) 

3.6.3 Summer √ (1) 
3.6.4

• • Sneezing and nasal irritation √ 
  • Yellow nasal discharge √ 
  • Shaking of head to get rid of the parasite √ (3)

3.7

3.7.1 Proper hygiene standards in abattoirs √ (1)
3.7.2 Quarantine of imported animals at ports of entry √ (1) 
3.7.3

• • Reporting any suspicion of the disease √
  • Eradication programs √ 
  • Immunisation campaigns √ (Any 1) (1)

[35] 

QUESTION 4: ANIMAL REPRODUCTION 
4.1

4.1.1 Embryo transfer √ (1) 
4.1.2

• • Prostglandin injection √
  • Gonadotropin - release hormone √ (2)

4.1.3 A Donor √ (1)
4.1.4 37 °C √ (1) 
4.1.5

(a) Their reproductive cycle is extended to produce more progeny √ (1)
(b) More profit from selling superior animals √ (1) 

4.2

4.2.1

A Oestrus √ 
B Di-oestrus √ 
C Met-oestrus √ 
D Pro-oestrus √ (4) 

4.2.2

(a) A √ (1)
(b) C √ (1) 

4.3

4.3.1

B vas deference √ 
D scrotum√ 
F seminal vesicle √ (3) 

4.3.2

• • Hypoplasia √ 
  • Cryptochidism √ 
  • Sperm defects √ (Any 2 x 1) (2) 

4.4

4.4.1 Exhaustion/Fatigue √ (1)
4.4.2 Malnutrition √ (1)
4.4.3 Lack of experience √ (1)
4.4.4 Temperament √ (1)

4.5

4.5.1 

Marking graph with the following checklist: 

(6) 

4.5.2 Milk yield increases drastically in week 7 and drops from week 15 to  week 20. √ 

OR 

For both groups milk yield increases from week 1 to week 7 and then it  decreases after week 7 until week 25. (1) 

4.6

4.6.1 C √ allantois √ (2)
4.6.2 F √ placenta √ (2)
4.6.3 B √ chorion/embryonic sac √ (2)

[35] 
TOTAL SECTION B: 105 
GRAND TOTAL: 150