Agricultural Sciences Memo 1 (English)

November 2014 — Grade 12 / Matric — Agricultural Sciences

Memo 2014 Grade 12 English Agricultural Sciences Hub →

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🎯 150 marks 📄 10 pages 📝 66 items found 📚 2 topics 🔑 1 key info

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Q1— Section header —

1.1.10(10 x 2\ (20\

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

1.3.5Fodder /feed flow Neck /head clamp Seminal vesicle /vesicular glands Oogenesis/ovigenesis

1.4.5Mechanical /physical Cafeteria style /ad lib/free choice Isolation /separation ron /Fe /ferrous sulphate

2.1Path of food in the stomach of a ruminant

2.1.1Identification of the type of anim al Ruminan /cattle/sheep/goats (1\

2.1.2Identification of the processes illustrated by , B and C A. Swallowing/peristalsis/ingestion/i ntake of food B.

2.1.3Justification of the advantages of process B ood broken down mechanically into finer particles ncreases surface area of food timulates secretion of s aliva to maintain rumen pH levels Improves the mixing of food

2.2he quality of pastures and nutritional values over three seasons

2.2.1Description of the size of micro organism population (a\ ncrease /high in population of amyloly tic bacteria ue to high energy in pasture (b\

2.2.2Quality of supplementary feed in winter upplement high/ rich in proteins /nitrogen/NPN Rich in arbohydrates/energy

2.2.3he vitamin that is l ikely to be deficient in winter Vitamin A /retinol (1\

2.3Coefficient of digestib ility of hay

2.3.1Coefficient of digestibility DM of hay: kg 2,88 or 24kg x 0,88 = 21,1kg 24kg 2,88kg = 21, kg

2.3.2Justification for not recommending the hay Digestibility 65,4% therefore it needs supplemen tation to improve digestibility

2.4Composition of animal feeds

2.4.1Feed most likely to be fed to ruminant animals

2.4.2Motivation for Feed Contains a low percentage of crude fibre /6% High percentage of TDN/80% Higher DP/8% Therefore it is easily digestible

2.4.3Calcul ation of nutritive ratio of Feed NR = TDN = 1 = 1 = 1

11.5/1:12

2.5odder flow programme

2.5.1onths in which there will be more feed /two months (1\

2.5.2Month in which the feed will be most insufficient September /Sep. (1\

2.5.3Calculate the shortage of feed during the month of October 0 tons 0 tons = 40 tons 0 tons x 1000 40 tons x 1000 kg

2.5.4EE cost effective measures of using feed for Jan and Feb Cutting fodder ling /making hay/ensiling (making silage\ Storage (3\

3.1System of farming

3.1.1Identification of a production system Back yard/free range /subsistence (1\

3.1.2THRE E advantages of back yard system to rural communities Less expensive /cheaper Easy to manage No special equipment needed No spec

3.1.3HREE problems of backyard system Easy to contact disease Poor feeding/ feeding on less nutritious food High risk towards predators More feed energy is utilised for non production purpose

3.2Structures, apparatus and appliances used in the handling of farm animals in an animal production system

3.2.1Barbed wire fence to divide area of farmland (1\

3.2.2raal made from branches and sticks (1\

3.2.3A shed made from wooden poles and canvas (1\

3.2.4Red flags with warning signs (1\

3.3Production systems

3.3.1Farming system by FARMER A Extensive system (1\

3.3.2TWO reasons Fewer workers /2 workers Limited facilities /1 cattle handling facility /1 farm shed/8 wind pumps/1 dipping station

3.3.3Difference in feeding strategies FARMER A is feeding livestock on natural pasture FARMER B is feeding livestock th ough a feedlot (2\ ie

3.3.4TWO measures to increase production for FARMER A Supplementary feeding/nutrition Control adverse environmental conditions through shelter Control of pests and diseases Correct breeding methods

3.5Type and name of tick One host tick Blue tick (2\

3.5Disease transmitted Red water naplasmosis/gall sickness (Any 1\ (1\

3.5Justification of chemical considered eco friendly sidual action Non systemic pecker compatible (Any 2\

3.5Method of applying the chemica Pour

3.5Evidence of the role of state in control ling remedies and medicines Reg istration number/Reg. No. G2837/ Act 36/1947 Active ingredients and their quantities/Deltrametrin 0.50% m/v,

3.6.2THREE measures of preventing plant poisoning Remove poisonous plants from pastures /burn the infested areas/a pplication of herbicides /chemicals Remove a

4.1Female reproductive organs

4.1.1Identification of parts of a female animal Uterine horn Fallopian tube/oviduct Ovary Vagina (4\ Letter and name with alkaline plug ervix (2\

4.2Levels of hormones during estrus cycle

4.2.1Graph the hormone levels Criteria/rubric/marking guidelines Correct heading axis correct calibratio ns and labelled (Concentration\ axis correct c

4.2.2Role of progesterone nhibits /suppresses the secretion/functioning of estrogen (1\

4.2Day when follicles will be fully developed Day 20

4.2Motivation Oestrogen is at its highest level/30mg/ml Progesterone is at its lowest levels/3mg/ml (1\

4.3Schematic representation of a sperm cel

4.3.1Identification of part B Nucleus (1\

4.3.2

4.3.3function of part labelled ovement /mobility/motility of the sperm cell (1\

4.3.4Distinction between a sperm cell and semen Sperm Male gamete /reproductive cell Sem Mixture of sperm cell

4.3.5TWO methods of collecting semen Artificial vagina Electrical stimulator/electrojaculator (2\

4.4Artificial insemination in farm animals

4.4.1Definition of AI A technique whereby semen is artificially collected from bulls and artificially p laced into

4.4.2THREE requirements for successful AI Correct d etection of hea /oestrus Correct timing Use of viable semen Correct technique Exper

4.5Stages embryo transfer

4.5.1Identification of technique Embryo transfer /ET (1\

4.5.2Correct order of embryo transfer Synchronisation o f both donor and recipient cows Super ovulation of the donor cow Artificial insemination of the donor cow

4.5.3TWO benefits of ET More progeny are produced from the best cows Profits are made from sales of quality genetics Fast cost effective method to improve genetic make of the herd Extended reproductive life of older and incapable cows

Topics Identified

Animal ProductionAgricultural Management

Mark Allocation

Total150 marks

Sections35 + 35 + 35 = 105 marks

Key Information

Contact Number0510152025 · 0354812162

Paper information

SubjectAgricultural Sciences

Year2014

SessionNovember

TypeMemo

PaperPaper 1

LanguageEnglish

Pages10

Downloads7

Examination context

Decade2010s

Years ago12y

SeasonSpring (SH)

Start dayWednesday

Exam periodNovember 2014

Days since exam4,370

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