Agricultural Sciences Memo 1 (English)

November 2018 — Grade 12 / Matric — Agricultural Sciences

Memo 2018 Grade 12 English Agricultural Sciences Hub →

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🎯 150 marks 📄 9 pages 📝 45 items found 📚 4 topics

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Q1— Section header —

1.1.10(10 x 2\ (20\

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

1.3.5arakeratosis Nipple /nipple drinker Ejaculation Meiosis Spermatozoon /sperm cell (5 x 2\

1.4.5Pearson Free range back yard semi intensive Infectious ontagious /pathogenic Dystocia Mesoderm

Q2— Section header —

2.1Schematic images of the internal parts in the alimentary canal of ruminants

2.1.1Identif ication of parts Omasum Reticulum (1\ (1\

2.1.2The function of PART Traps hard and indigestible substances separate coarse and fine food materials rind ing of food particles Sends large substances back to the rumen

2.1.3Structure in Part A responsible for the production of heat Heating rods/papillae (1\

2.1.4ONE requirement of rumen microbes in ruminants Easily digestible carbohydrates /regular intake of feed Sufficient mineral nutrients Sufficient nitrogen Anaerobic/oxygen free

2.2igestibility trial with ruminant animals

2.2The digestibility coefficien Dry matter inta ke (kg\ Dry mass of manure (kg\ x 100 Dry matter intake (kg\ DM =

2.2.2Implication of calculated DC More (64,8%\ of the feed was excreted Less (35,2%\ of the feed was digested and absorbed

2.2.3Classif ication of the feed Roughage (1\

2.3Animal feeds

2.3.1Feed sui table for young growing animals Feed A (1\

2.3.2Reason

Q2— Section header —

2.3.3FEED B not recommended as a main feed for non ruminants It has a high crude fibre content/CF of 17% and resultant low TDN/55% which is less than 60% (2\

2.3.4Relationship between total digestible nutrient and crude fibre content of FEED The low er the crude fibre content the higher the total digestible nutrients

Q3— Section header —

3.1Animal production system Identification of production systems xtensive production system ntensive production system (1\ July Aug.

3.2.2Reason for nutritional requirements for growth stage A For growth (1\ TWO other factors to increase production in broilers Controlled e nvironment /proper housing Breeding

Q4— Section header —

4.1The male reproductive system

4.1.1Identif ication of parts Vas deferens ampul Urethra (1\ (1\

4.1.2TWO functions of the secretion of vesicular gland Provide n utrition/n ourishing energy to the sperm cell Transportation of

4.1.3Congenital defect of part Under developm ent /hypoplasia Penis t hort /too long Abnormal openings

4.1.4Indicat ion of the effect on th e fertility of the bull (a\ Affects spermatogenesis low sperm count/sperm denaturing/ infertility (b\

4.2.3TWO visible signs displayed when oestrus is in its peak Mounts other cows Restlessness Swelling of the vulva Excessive mucus secretion from the vulva Mucus membranes of the vagina appears red and moist

4.2.4Function of FSH Stimulates the formation of follicles Facilitates/stimulates growth/development and function of the Graafian follicle ( Any 1\ (1\

4.3Reproductive processes in sheep

4.3.1The correct chronological orde (1\ (1\ (1\ (1\ (1\

4.3Defin ition of synchronisation hanging the oestrus cycle in a group of ewes/ female animals so that they c ome to oestrus

4.4he re production cycle of a dairy cow

4.4.1month in which artificial insemination shou ld take place May

4.4.2TWO possible causes for the cow not conceiving Improper handling of semen /poor quality semen Use of inexperienced technician Diseases /infections

4.4.3HREE uses of abortion in dairy cows nfectio ns/diseases Malnutrition Injuries Maltreatment /stress Environmental factors

4.4.4last process coming just before the start of milk production Calving /parturition giving birth (1\

4.5The graph indicat ing milk production, fat content and crude fibre conten t of a dairy cow for 10 months

4.5.1Month 6 (1\

4.5.2litres (1\

4.5.3THREE reasons for the drop in milk production Illness/sick ness /diseases Malnutrition /improper feeding Extreme environmental conditions

4.5.4elationship between crude fibre and fat content from month 6 to 10 As the crude fibre content increase

Topics Identified

Plant ProductionAnimal ProductionAgricultural ManagementSoil Science

Mark Allocation

Total150 marks

Sections35 + 35 + 35 = 105 marks

Paper information

SubjectAgricultural Sciences

Year2018

SessionNovember

TypeMemo

PaperPaper 1

LanguageEnglish

Pages9

Downloads5

Examination context

Decade2010s

Years ago8y

SeasonSpring (SH)

Start dayMonday

Exam periodNovember 2018

Days since exam2,913

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Grade 12 Agricultural Sciences combines scientific knowledge with the application and interpretation of agricultural concepts.

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