Agricultural Sciences Memo 1 (English)

May-June 2023 — Grade 12 / Matric — Agricultural Sciences

Memo 2023 Grade 12 English Agricultural Sciences Hub →

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🎯 150 marks 📄 10 pages 📝 77 items found 📚 4 topics

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Q1— Section header —

1.2.5only oth A and B A only B only None (5 x 2\ (10\

1.3.5Regurgitation retro peristalsis Quarantine/isolation Urethra Nucleus Repeat

1.4.5Bolus Commercial Scrotum Mummification Ejaculation 5 x 1\ (5\ TOTAL SECTION A:

Q2— Section header —

2.1Digestive system of a farm animal

2.1.1Name of the farm animal Chicken/fowl /poultry (1\

2.1.2TWO reasons visible in the diagram Presence of a crop Presence of proventriculus/gland ular stomach Simple stomach /monogastric Presence of ventriculus/gizzard

2.1.3Indication of the pH (a\ Acidic (b\ Alkaline

2.1.4TWO importance of the substance /gastric juice in digestion It is antiseptic and destroys bacteria/prevent rotting of the stomach content Changes the pH of the stomach from alkaline to acidic Changes disaccharides into monosaccharide

2.1.5Role played by part labelled C/gizzard t grinds food into smaller particles fo r easy digestion /mechanical/ physical digestion (1\

2.2Sow and its litter in a farrowing pen

2.2.1Mineral element deficient Iron /Fe (1\

2.2.2TWO i ron deficiency symptom Anaemia Paleness of mucous membranes Listlessness/laziness /fatigue /lethargy Laboured

2.2.3A method of supplementing iron Soil sods Injection Iron paste /paint/solution (Any 1\ (1

2.2.4Feed component for optimum growth of piglets Protein (1\

2.3eed trial

2.3.1he purpose of the feed trial To determine the digestibility of the hay/ amount of oat hay digested and absorbed (1\

2.3.2Classification of the feed Roughage (1\

2.3.3Calculation of the digestibility co efficiency DC = Dry material intake (kg\ Dry mass of manure (kg\ 100 Dry material intake (kg\ 1

2.3.4Naming the substance (a\ Molasses (b\ Urea/biuret (1\ (1

2.4Nutritive ratio

2.4.1Calculation (a\ % of non nitrogen substances = 80 8% = 72%

2.4.2TWO components making up non nitrogen content in a feed Digestible fat /lipids Digestible carbohydrates Vitamins Minerals (Any 2\

2.5eed flow programme

2.5.1Calculation of the total amount of feed required eed required = number of animal s x feed/animal /day number of days = 150

2.5.2Quantity of cattle feed during month 3 Feed will be enough (1\

2.5.3Reason Feed required is 22 500 kg and feed available is 30 000 kg/there is a surplus of 7 500 kg (1\

2.5.4he month with the least shortage of feed Month 6 (1\

2.5.5ONE cost effective strategy to address the shortage of feed Storage feed during months where there is an excess Stock reduction/culling Controlled calving /change the breeding season Planting of seasonal fodder crops

Q3— Section header —

3.1roduction output and cost distribution for two feedlots

3.1.1he feedlot which operates at the highest cost Feedlot 2 (1\

3.1.2he feedlot which operates n the most cost efficient way Feedlot 1 (1\

Q3— Section header —

3.2ow the structures help the farm animals to survive adverse environmental conditions (a\ Shelter as

3.3emperature requirement s of broilers at different ages

3.3.1he temperature requirements at three weeks 25 (1\

3.3.2The t rend of temperature requirements over a period of 7 weeks Temperature requirements decline with increased age until it stabilizes from week 5 to 7 (2

3.3.3Line graph showing the temperature requirements of broilers at different ages for the first month CRITERIA/RUBRIC/MARKING GUIDELINES Correct heading

3.4Handling facility 3. .1 Identification of the handling facility Holding pen /paddock (1

3.4.2TWO reasons for restraining farm animals in a crush To ensure safety while working with large animals /no harm to the handlers To be able to work wit h animals while they are stable

3.4.3TWO basic guidelines when handling cattle Keep safety as the main principle in mind Cattle should be kept as calm as possible Use the correct handling equipment facilities No carrying of stick

3.5Animal diseases

3.5.1Completing the table on animal diseases Virus Mastitis

3.5.2TWO preventative measures for controlling Newcastle disease Timely diagnosis and vaccination against diseases Outbreaks must be detected quickly Good husbandry must be practiced/housing/nutrition/ management

3.5.3TWO financial implications of animal diseases Decrease in production /poor quality Stock losses/death Decrease in income /profit

3.6Letters representing stages in the life cycle of the parasite (a\ (b\ (c\ (d\

3.7TWO symptoms of urea poisoning in farm animals ervous symptoms/lack of balance /incoordination xcessive salivation Frequent defecation and urination Struggling violently

Q4— Section header —

4.1The reproductive systems of farm animals

4.1.1The letter representing the part in the diagrams (a\ (b\ (c\ (1\

4.1.2A membrane responsible for implantation Endometrium (1\ (1\

4.1.3he part performing the same function as the testis (1\

4.1.4TWO congenital defects of the testes Cryptorchidism Hypoplasia (2\

4.2Pie chart

4.2.1Duration of the oestrus cycle in cows 21 days (1\ (1\

4.2.2estrus stage (a\ Di oestrus

4.2.3he letter representing the stage of oestrus cycle (1\

4.2.4TWO practical methods to identify a dairy cow in heat Heat mount detector Tail chalking /tail head marker Pedometer Chin

4.2.5hat happens to the corpus luteum if the cow becomes pregnant Corpus luteum persists and continue to secrete progesterone (1\ Agricultural Sciences/P1

4.3Mating behaviour

4.3.1TWO factors regulating mating behaviour Hormonal influences Social interaction Senses /sight/smell Environmental factors Physiological factors Previous experience Health

4.3.2Substance in cow s urine that stimulates libido in bulls Pheromones (2 (1\

4.4Reproductive techniques

4.4.1Identification of a reproductive technique (a\ Cloning (b\ ynchronization of oestrus embryo transfer

4.4.2Definition of e mbryo transfer The transfer of embryo from a genetical ly superior female animal donor to the uterus of genetically i nferior female animal

4.4.3TWO advantages of Artificial insemination Reduces the exchange of sexually transmitted diseases Superior male animal can fertilize more female animals Semen from males in other countries can be used Quick and economical way to improve the herd

4.4.4Reproductive stage following immediately after successful insemination Fertilisation (2 (1\

4.5Parturition

4.5.1Scientific term for difficult birth Dystocia (1\ Agricultural Sciences/P1 10 DBE/2023 SC/NSC

4.5.2TWO causes of dystocia Deviation of the head Flexion of elbow Retention of one or both forelegs Hydrocephalus Congenital defects/abnormalities malformed foetus Twinning

4.5.3ormone Relaxin (1\

4.5.4THREE oticeable behavioural changes in a cow which is about to give birth Isolation/

4.6Milk production in cows

4.6.1The hormones responsible for (a\ Milk production Prolactin (b\ Milk release Oxytocin

4.6.2TWO stimuli enhancing the release of milk Touching/washing/massaging of the udder Sound of the milking machine Presence sight of the calf /suckling of the calf Presence of the milker

Topics Identified

Plant ProductionAnimal ProductionAgricultural ManagementSoil Science

Mark Allocation

Total150 marks

Sections35 + 35 + 35 = 105 marks

Paper information

SubjectAgricultural Sciences

Year2023

SessionMay-June

TypeMemo

PaperPaper 1

LanguageEnglish

Pages10

Downloads2

Examination context

Decade2020s

Years ago3y

Season—

Start day—

Exam period—

Days since exam—

About Agricultural Sciences examination preparation

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