Agricultural Sciences Memo 1 (English)

November 2020 — Grade 12 / Matric — Agricultural Sciences

Memo 2020 Grade 12 English Agricultural Sciences Hub →

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🎯 15 marks 📄 11 pages 📝 83 items found 📚 4 topics

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Q1— Section header —

1.1.10C/

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

1.3.5Digestibility co efficiency Dosing /drenching Artificial Insemination/ AI Sterility Progesterone

1.4.5Sublingual Free range Hypoplasia Prostate Flushing harvesting (5 x 1\

Q2— Section header —

2.1Alimentary canal

2.1.1Naming of the animal in DIAGRAM 1 Chicken/fowl/poultry DIAGRAM 2 Cattle/sheep/goat

2.1.2Identification of the letters (a\ (b\ (c\

2.1.3TWO adaptations of the rumen to digest feed rich in fibre Presence of micro organisms /rumen micro

2.2Components of feed

2.2.1Identification of the component Minerals /elements

2.2.2TWO ways of supplementing minerals to animals Mineral lick Drinking water /mixing it with water Soil sods Dosing drenching Injection

2.2Indication of the component (a\ Protein /B (b\ Carbohydrates

2.3Digestibility co efficiency

2.3.1Calculation of the digestibility co efficiency DC = Dry matter inta ke (kg\ dry mass manure (kg

2.3.2Implication of the calculated value The feed was highly digested 4,07% of feed is digested 25 ,93% is excreted (Any 1\ (1\

2.3.3TWO factors contributed to the d igestibility of the feed used during the trial Composition of the feed/ ration

2.4Energy value of feeds

2.4.1Energy important for production and maintenance Net energy /NE (1\

2.4.2TWO reasons for knowledge of the energy value of the feed To determine the type of animal diet To determine feeding standards Meet animal requirements at different stages of production To determine ration formulation

2.5Nutritive ratio

2.5.1Calculation of the nutritive ratio (NR\ Nutritive Ratio = 1 : DN NE %DP

2.5.2Indication of the age group that will benefit most from the feed Young/ growing producing a nimal

2.5.3TWO reason s for using the feed to feed young animals Rati on has a narrow nutritive ratio /less than 1:6

2.6Planning and managing of the feed

2.6.1Appropriate term eed/f odder flow programme (1\

2.6.2TWO importance of planning fodder production To ensure safe use of resources To meet the animal feed requirements throughout the year To m argin

2.6.3TWO aspects to be considered when planning fodder production The number of livestock Nutrient content of the feed Possible feeds available

Q3— Section header —

3.1Temperature requirement for broiler chickens

3.1.1Bar graph CRITERIA/RUBRIC/MARKING GUIDELINE Correct heading axis: Correctly calibrated with labe

3.1.2Trend of temperature requirement for broiler chickens Temperature requirement of broiler chickens decreases with increase in age The younger the chickens the higher the temperature requirements The older the chickens

3.1.3Equipment to maintain temperature in a broiler house Heaters/air conditioners /fans/infra red lamps/ curtains /insulators

3.2Indication of the animal showing the behaviour

3.2.4Cattle Sheep Pigs Chickens poultry/birds (1\ (1\ (1\

3.3Farming systems

3.3.1Identification of the farming system PICTURE A Commercial PICTURE B Subsistence (1\ (1

3.3.2Comparison of the farming systems Commercial farming system High environmental pollution due to heavy use of chemicals release gases like

3.4Parasites

3.4.1Classification of diseases according to pathogens Bacteria Viral (1\

3.4.2Meaning of zoonotic diseases Diseases that can be transmitted from animals to humans and humans to animals (2

3.4.3Reason for wine lu to be enzootic Affects specifi c animals in a particular region (1\

3.4.4TWO roles of the state in controlling notifiable diseases lementation of legislation Creation of buffer zones for testing and vaccination of clean

3.5Internal parasites

3.5.1Identification of the internal arasites Parasite A

3.5.2TWO visible symptoms in sheep infested with roundworm Diarrhoea Whitish mucus membranes in the inside of the eyelids Anaemia Weight loss Rough coat

3.5.3TWO management practices to manage heavy infestation of flock by internal parasites Resting, rotational grazing of

3.6Plant poisoning

3.6.1Identification of the poison Maize fungus (1\

3.6.2TWO measures to prevent fungus contamination of stored feeds Store feeds in a dry cool place /avoid wet areas Improved ventilation Continuously

3.6.3TWO actions to be taken once the presence of maize fungus is detected in feed Remove and dispose of the feed contaminated with

Q4— Section header —

4.1Reproductive system of a bull

4.1.1Identification of parts Testes /scrotum Penis /urethra Vas deferens

4.1.2ONE function of testes Secretion of hormone testosterone /male sex hormone Production of sperm cells /male sex cells (Any 1\ OR ONE function of the scrotum

4.1.3Role of seminal vesicle Secrete fluid that transports the spermatozoa Protect the semen against pH changes Provide energy for sperm cells

4.2Lack of ibido in bulls

4.2.1Term for the condition Lack of libido (1\

4.2.2THREE causes of lack of libido Immaturity lack of experience Overwork/ exhaustion /over exertion Mal nutrition

4.3Process of rtificial nsemination (AI\

4.3.1Identification of the hours after oestrus to get the highest pregnancy rate 10 to 13 hours after onset of oestrus (1\

4.3.2A reason why the cow would allow inse minat ion between the first hour and 12 hours after the start of oestrus The c

4.3.3TWO visible signs the cow will show when in oestrus Allows mating/ insemination Mucus strings from the vulva Swollen and red vulva Mounts others Hair on the back

4.3.4ONE reason to in seminate hours before ovulation Ovum has a shorter lifespan than a sperm cell vum needs to arrive when sperm cells are al ready waiting for fertilisation

4.3.5ONE requirement for a successful insemination Use of healthy/ viable semen Technique performed by a skilled/ experienced

4.4Fertilisation

4.4.1Labels Egg cell /ovum /female gamete Sperm cell /spermatozoon

4.4.2Name of the process represented by the illustration Fertilisation (1\

4.5Pregnancy

4.5.1Identification of the process Pregnancy/ gestation (1\

4.5.2THREE stages of the process Ovum stage of ovum Embryo /embryonic stage/ stage of embryo Foetal

4.5.3Indication of the normal presentation of the calf Anterior (1\ Agricultural Sciences/P1 11 DBE/ November 2020 SC/NSC

4.6Parturition

4.6.1The condition experienced by heifers calving for the first time Dystocia (1\

4.6.2 TWO signs of an animal experiencing birth problems Show signs of prolonged distress

4.6.3 ONE cause of problems during birth in heifers Large foetus /small sized heifer Small pelvic area Inexperience Incorrect presentation

4.6.4Hormone that initiates milk release Oxytocin (1\

4.6.5First milk produced in the first 3 days after calving Colostrum /beesting (1\

4.7Embryo transfer

4.7.1Process in the scenario Embryo transfer /ER (1\

4.7.2Main importance of embryo trans fer Creation of multiple offspring with the desirable chara cteristics of superior parents

4.7.3Explanation of a donor cow Produc tion of superior ova for implantation to inferior cows (2

Topics Identified

Plant ProductionAnimal ProductionAgricultural ManagementSoil Science

Mark Allocation

Total150 marks

Sections35 + 35 + 35 = 105 marks

Paper information

SubjectAgricultural Sciences

Year2020

SessionNovember

TypeMemo

PaperPaper 1

LanguageEnglish

Pages11

Downloads11

Examination context

Decade2020s

Years ago6y

SeasonSpring (SH)

Start dayThursday

Exam periodNovember 2020

Days since exam2,181

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