Agricultural Sciences Paper 1 (english)

Feb-March 2012 — Grade 12 / Matric — Agricultural Sciences

Past Paper 2012 Grade 12 English Agricultural Sciences Hub →

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🎯 150 marks 📄 15 pages 📝 117 items found 📚 4 topics

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Q1— Section header —

1.1

1.1.11A B C D

1.1.1

1.1.2

1.1.3

1.1.4

1.1.5

1.1.6Milk production is a process that follows a series of actions until milk is released from the teat openi ng. Select the correct order of Alveoli teat cavity Alveoli milk tubes

1.1.7A feeding approach where farm animals have unlimited access to roughages or licks:

1.1.8Which ONE of the following is INCORRECT with respect to the precautions that need to be considered when livestock is Animals of different ages and sexes shou ld NOT be d to enter the part of the

1.1.9

1.1.10Shelter used for the most cost-effective production output is average production. (10 x 2\ ANSWER SHEET. Example: a tick-borne disease transmitted

1.2.1B: amylase the enzyme in the small intestines responsible for fat digestion A: castration

1.2.2B: congenital diseases A: balling gun

1.2.3B: drenching gun to give medicine to a sick animal A: cud

1.2.4B: chyme regurgitated bolus that is transported back to the mouth by means of retro-peristalsis A:

1.2.5B: bruising poor meat quality due to injury caused by poor or incorrect (10)10

1.2In the table below a description and TWO possible answers are given. Decide whether the description in COLUMN B relates to A only, B only, both A and B or NONE of the answers in COLUMN A and make a cross (X\

1.3.5feed source for dairy cattle the grazing animals with additional nutrients

1.4.512 by rumen micro-organisms. a stud breeder, who are be described as a heterogeneous South Africa.

1.3

1.3.1Roughage with a high moisture cont ent which is mostly used as a A nutrient supplement that is placed in a pasture field to provide A breeding system in which individua ls from one breed are allowed to mate with individuals from another breed

1.4Change the UNDERLINED WORD(S\ he following statements to make them TRUE. Write \n

1.4.1Calcium is an essential mineral nutrient for the synthesis of vitamin A herd of cattle from closely related, can population. There are many exotic breeds that originate fr om different areas in animals maintain a const

2.1.2above. that show the movement of (2)2

Q2— Section header —

2.1The diagram below illustrates the proc ess of rumination in the stomach of a ruminant. The arrows point out the movem ent of the food in the different parts

2.1.1Identify the parts labelled and in the stomach area illustrated Briefly describe the process of rumination by referring to the arrows food in this alimentary canal.

2.1.3

2.1.4Name TWO functions of bacte ria and protozoa in this alimentary B C D Food forced back ood mixed with saliva Food kept wet excreted 4 kg dry material in the manure.

2.2.3calculations. Define the term digestibility of a feed feed. (4)4

2.2The value of a feed can be determined by calculating the digestibility coefficient. A cow ingested 15 kg of hay with a moisture content of 10% and

2.2.1Calculate the digestibility coefficient of the hay. Show ALL your Explain how the crude fibre content influences the digestibility of a

2.3The table below represents the nutrit ional information of selected feeds. FEED CRUDE PROTEIN (%\ CRUDE FIBRE (%\METABOLISABLE Lucerne hay 30,1 40,1 7,4 Maize meal 8,9 2,0 12,0 Silage 7,8 4,2 4,1

2.3.1Select a feed that is most suitable for each of the following (a\

2.3.2The farmer wants to mix concen trates for a ration for animals with ent of 14%. There is sunflower oilcake Use the Pearson square method to calculate the ratio in which maize meal and sunflower oilcak

2.4The data provided in the t able below relates to the bi ological values (BV\ feedstuffs derived from animal and plant ANIMAL FEED BIOLOGICAL VALUE (BV\ Fish meal 90 Soya beans 80 Wheat 60 Groundnuts 75

2.4.1Briefly explain the term biological value (BV\ of a protein. (2\ animals. Justify this statement. (2)2

Q2— Section header —

3.1.2conditions. Give a reason for your answer. weather conditions in order to ma (2) (2)2

3.1.42

2.4.2The role played by the qualit y of the protein in a ration for ruminants is less important than that for non-ruminant farm

2.4.3Draw a bar graph to compare the biological values of proteins for the different feedstuffs provided fo r the growing pigs, as shown on

Q3— Section header —

3.1

3.1.1Select the type of farm animal fr om the table above that would require more environmental contro l measures under cold climatic Describe TWO methods to prot ect animals against extreme intain optimal production levels.

3.1.3Discuss the advantage that the c onstant body temperature of a Cows have a better growth rate than pigs at an environmental tivate this statement.

3.2In South Africa the climate for the production of farm animals varies from region to region and different regions utilise different animal breeds and systems of production. Some animals require shelter and other forms of

3.2.2animal producers in South Africa. (2) (3)3

3.2.4State TWO factors that determine the behaviour of an animal. handler should bear in mind when working with animals. (2) (2)2

3.2.1Name TWO main production systems commonly practised by Name THREE factors that farmers should take into account when deciding on the site for the cons truction of shelter to maximise production.

3.2.3Name TWO characteristics or warn ing signs that can be displayed by animals to indicate fear, aggression and contentment, which the

3.3The diagrams below illustrate different systems of production.

3.3.1From the diagrams marked to , select the shelters which are the wing systems of production: (a\ Extensive farming Indigenous system of farming

3.3.2Name TWO characteristics t hat are normally associated with the (b)

3.4.2milk from month to month , illustrated in the graph above. from month to

3.4.4ctation curve and developed a disease and give a reason to support your answer. Indicate the success of the treatment for this disease by referring to the graph above.

3.3.3Compare, in table format, the production systems marked and with regard to the following aspects: (a\

3.4The graph below illustra tes the effect of crude fibre on fat content and milk Milk production over a lactation period 12345678910 Time (Months\ Quantities Milk production (litres/day\ Fat content (%\

3.4.1Describe the effect of the crude fibr e value on the fat content of the Predict the effect of crude fibre on the quantity of milk produced

3.4.3The cow did not follow a normal la disease. Identify the possible time that this cow developed this Milk production over a lactation period Time(Months\ Quantities Milk production (litres/day\ Fat content (%\

Q4— Section header —

4.1The diagram below illustrates horm one release during the oestrus cycle.

4.1.1Describe THREE changes that the follicle undergoes during the oestrus cycle by referring to the diagram above.

4.1.2Name a function of the follo wing hormones in the oestrus cycle: (a\ Oestrogen esterone Luteal phase Rescued Ovarian ne cycle Ovarian

4.2.2Anoestrus Infantilism (2) (2) opment of the foet

4.2Indicate how the following physiolog ical factors cause infertility in farm

4.3The diagram below illustrates the devel us of a cow.

4.3.1Name the TWO parts labelled and that form part of the

4.3.2Identify the conditions that may occur if the following are (a\ When the fluids from the foetus are all resorbed and the foetus The foetus dies and the softer tissues decay, leaving hard

4.4South Korean animal rights activist s, wearing livestock masks, mounted a Since November 2010 Korea has killed mo re than 1,93 million livestock when [Adapted from Cape Times , 24 January 2011] amniotic fluid

4.4.2disease. disease. (1) (2)2

4.4.4disease. foot-and-mouth disease. (3) (3)3

4.4.1Indicate why foot-and-mouth disease is such a threatening Describe TWO control measures to prevent the spread of this

4.4.3Indicate THREE main types of li vestock affected by foot-and-mouth Describe THREE symptoms of

4.5The picture below illustrates a product that controls ticks.

4.5.1Briefly describe how the tick- control measure in the picture above What is resistance? The ability of the tick to resist the effect of the chemical active used against it Resistance is genetically inheritable

4.5.3deal with tick resistance that is genetically inherited. (2) (2)2

4.5.5(1) (2) South Africa.

4.6.2with internal parasites. parasite infestation rate. (2) (2)2

4.5.2Suggest TWO measures that farmers can put in place to prevent ticks from developing resistance to the miticide/acaricide. State TWO ways in which anima l breeders and cattle farmers can

4.5.4Identify the critical stage of t he life cycle of ticks where the eggs are viable. Name TWO ways of controlling this pest in grazing camps.

4.6Internal parasites cause huge econom ic losses to livestock production in

4.6.1Name TWO common symptoms of farm animals that are infected Indicate TWO environmental conditions that exist in camps that are being used by animals that will c ontribute to a higher internal TOTAL SECTION B:GRAND TOTAL:

Q1— Section header —

1.3.1______________ _________________

1.3.2______________ _________________

1.3.3______________ _________________

1.3.4______________ _________________

1.3.5______________ _________________

Q1— Section header —

1.4.1______________ ________________

1.4.2______________ ________________

1.4.3______________

1.4.4______________

1.4.5

1.1.1A B C D

1.1.2A B C D

1.1.3A B C D

1.1.4A B C D

1.1.5A B C D

1.1.6A B C D

1.1.7A B C D

1.1.8A B C D

1.1.9A B C D

1.1.10A B C D TOTAL SECTION A: 45

Q1— Section header —

1.2.1A B C D

1.2.2A B C D

1.2.3A B C D

1.2.4A B C D

1.2.5A B C D (5 x 2\10\ ________________ ________________ ________________ (5 x 1\5\

Topics Identified

Plant ProductionAnimal ProductionAgricultural ManagementSoil Science

Mark Allocation

Total150 marks

Sections35 + 35 + 35 = 105 marks

Per-question sum168 marks

Paper information

SubjectAgricultural Sciences

Year2012

SessionFeb-March

TypePast Paper

PaperPaper 1

LanguageEnglish

Pages16

Downloads5

Examination context

Decade2010s

Years ago14y

Season—

Start day—

Exam period—

Days since exam—

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