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ZIMSEC O Level · 4001/1 · N2021

Agriculture Paper 1 November 2021

Questions
40
Time allowed
60 min
Syllabus code
4001/1

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Questions
40
Pass mark
24
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Answer every question in the printed order, get marked at the end, then see the answers.

The questions

Question 1

Natural Resources And Conservation
High humidity increases
  1. Awater losses through transpiration.
  2. Bevaporation from water bodies.
  3. Coutbreak of fungal diseases.
  4. Dwilting of crops.

Question 2

Natural Resources And Conservation
Why is rainfall effectiveness important in cereal production?
  1. Aprovides enough moisture for crop growth
  2. Bfarmers have experienced it over the years
  3. Cis well distributed throughout the year
  4. Dreduces crop yield

Question 3

Crop Production
Which of the following is a principle of crop rotation?
  1. Ashallow rooted crops to be included in the rotation
  2. Bdeep rooted crops to be included in the rotation
  3. Calways include a legume in the rotation
  4. Dmanure to be applied after every year.

Question 4

Natural Resources And Conservation
Human and wildlife conflicts are caused by
  1. Apoaching.
  2. Bselling of products from wildlife.
  3. Csetting settlements in game parks.
  4. Doutbreak of diseases in game parks.

Question 5

Natural Resources And Conservation
How does preservation affect wildlife trading?
  1. Aleads to unnecessary expenditure to prevent poaching
  2. Bprohibit trade in certain species and their products
  3. Cit promotes illegal trade of natural resources
  4. Dleads to extinction of some natural resources

Question 6

Natural Resources And Conservation
Deforestation causes
  1. Aloss of biodiversity.
  2. Breduced soil erosion.
  3. Cincreased soil fertility.
  4. Dincreased biodiversity.

Question 7

Soils
A soil which is structureless
  1. Acontains more living organisms.
  2. Bcontain more plant nutrients.
  3. Chas high water retention.
  4. Dis highly leached.

Question 8

Soils
Farmers send soil samples for testing to determine
  1. Asoil colour.
  2. Bsoil texture.
  3. Csoil drainage.
  4. Dsoil fertility.

Question 9

Soils
The downward movement of water through the soil is called
  1. Aseepage.
  2. Binfiltration.
  3. Cdrainage.
  4. Dleaching.

Question 10

Soils
Soil with a good structure is
  1. Afriable.
  2. Beasily leached.
  3. Cprone to erosion.
  4. Dprone to crusting.

Question 11

Soils
Which is the ideal structure for an arable land?
  1. Aplaty
  2. Bblocky
  3. Ccrumb
  4. Dsingle grain

Question 12

Soils
Excess water in the soil causes
  1. Aseepage.
  2. Bwater-logging.
  3. Ccapillarity.
  4. Dinfiltration.

Question 13

Plant Science
The following is a leaf's adaptation to photosynthesis.
  1. Amany veins to supply water
  2. Bleaves narrow to give small surface
  3. Cfew stomata for gaseous exchange
  4. Dthick cuticle for carbon dioxide to diffuse through a long distance

Question 14

Soils
Which soil horizons make up true soil for crop production?
  1. Ahorizon C and B
  2. Bhorizon B and A
  3. Chorizon A and C
  4. Dhorizon D and A

Question 15

Plant Science
The diagram shows the structure of a flowering plant. Name the part labelled X.
  1. Astyle
  2. Bstamen
  3. Cfilament
  4. Danther

Question 16

Plant Science
Which part of a flower develops into a seed?
  1. Aovule
  2. Bsepal
  3. Covary
  4. Dstigma

Question 17

Crop Production
Which one is a class of leaf vegetables?
  1. Acereals
  2. Bbrassicas
  3. Clegumes
  4. Dcurcubits

Question 18

Plant Science
The time when plants are exposed to day-light is
  1. Aphotoperiodism.
  2. Bphototropism.
  3. Chydrotropism.
  4. Dgeotropism.

Question 19

Crop Production
Soil is pressed around the seedling during transplanting to
  1. Aremove air pockets.
  2. Bstrengthen the seedling.
  3. Cstrengthen the soil.
  4. Dallow water percolation.

Question 20

Plant Science
What is the best remedy for a maize plant whose leaves have purple tints?
  1. AApplying of animal manure at an interval of four years.
  2. BApplying phosphate based fertilisers.
  3. CSoil needs calcium treatment.
  4. DLiming the soil every year.

Question 21

Crop Production
How is the grain weevil controlled?
  1. Afumigating
  2. Bbaiting
  3. Cuse of clean seed
  4. Dspraying

Question 22

Crop Production
Most suitable irrigation method for citrus production is
  1. Adrip.
  2. Bflood.
  3. Chosepipe.
  4. Dsprinkler.

Question 23

Soils
In the nitrogen cycle, how is nitrogen made available from the atmosphere to the plant?
  1. Anitrification
  2. Bdecomposition
  3. Cdenitrification
  4. Dfixation

Question 24

Animal Production
Calculate the mixing ratio of a feed with 10% digestable crude protein (DCP) if groundnut cake has 40% DCP and maize 8% DCP.
  1. A1: 10
  2. B1: 20
  3. C1: 15
  4. D1: 30

Question 25

Animal Production
An animal that died from anthrax can be identified by
  1. Adarkening of hind legs.
  2. Bswelling around joints.
  3. Cswelling of the stomach.
  4. Doozing of blood from all openings.

Question 26

Animal Production
The diagram shows the reproductive system of a cow. Which part prevents the premature release of an embryo?
  1. AA
  2. BB
  3. CC
  4. DD

Question 27

Animal Production
In which labelled part does embryo implantation take place?
  1. AA
  2. BB
  3. CC
  4. DD

Question 28

Genetics And Breeding
Select a pair of recessive genes.
  1. APP
  2. BpP
  3. CPp
  4. Dpp

Question 29

Animal Production
How many broilers can be accommodated in a 15 m2^2 deep litter house given a floor space of 0,15 m2^2 per broiler?
  1. A30
  2. B100
  3. C200
  4. D225

Question 30

Farm Mechanisation
Which part of a maize sheller cleans maize grains?
  1. Adust exhaust
  2. Bdressing fan
  3. Cgrain outlet
  4. Dbase plate

Question 31

Farm Mechanisation
Which part of a mouldboard plough should be greased regulary?
  1. Amouldboard
  2. Bshare
  3. Cwheel
  4. Dbeam

Question 32

Farm Mechanisation
How is a mouldboard plough adjusted to make a wider cut?
  1. Aslide the hitch assembly to the left
  2. Bslide the hitch assembly to the right
  3. Craise the hitch
  4. Dlower the hitch

Question 33

Farm Structures
Identify a material used on farm buildings.
  1. Awire strainer
  2. Bconcrete
  3. Ctrowel
  4. Dpliers

Question 34

Farm Structures
Why is thatch considered suitable for the constructions of buildings? It
  1. Ais expensive
  2. Bis easy to work with
  3. Chas good insulating properties
  4. Dcan be attacked by boring pests

Question 35

Farm Structures
Select a list of materials for road construction.
  1. Aaxes, gravel, cement
  2. Bquarry stones, drainage pipes, gravel
  3. Ccement, quarry stones, wheelbarrows
  4. Dquarry stones, gravel, wheelbarrows

Question 36

Farm Economics
One function of marketing is
  1. Abudgeting.
  2. Bfinancing.
  3. Cprofiting.
  4. Ddiminishing.

Question 37

Farm Economics
Identify a method which minimises the effects of uncertainties.
  1. Achanges in government policy
  2. Bgrowing crops on contract
  3. Cunavailability of labour
  4. Dtechnological changes

Question 38

Farm Economics
What is the condition of a market at equilibrium point?
  1. Aconsumers buy less
  2. Bcommodity price is high
  3. Call the commodity is sold
  4. Dconsumers buy more of the commodity

Question 39

Farm Economics
Price elasticity of supply is
  1. Aprice at which supply equals demand.
  2. Brelationship between supply and price.
  3. Cfall in supply as a result of increase in prices.
  4. Dpercentage change in quantity supplied due to percentage change in price.

Question 40

Farm Economics
A farmer earns $1 000 000 from the sale of groundnuts and suddenly changes over to growing cotton which earned him $1 070 000. What is the opportunity cost?
  1. A1 000 000
  2. B1 070 000
  3. C70 000
  4. D2 070 000

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