PROVISIONAL MARKING KEY FOR 2023 JCE AGRICULTURE NED MOCK
SECTION A (20 MARKS)
1. C
2. A
3. B
4. D
5. B
6. A
7. C
8. B
9. D
10.B
11.D
12.A
13.B
14.D
15.B
16.A
17.C
18.A
19.D
20.C
(I mark for each correct answer)
SECTION B (50 marks)
21. a. - production
- financing
- record keeping
- budgeting
- decision making
(1 mark for any 1)
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b.
22.a. - limited access to land ownership
- limited access to credit facilities
- time constraints
- low adoption of technology
- low quality produce
- low income
- limited access to labour
(2 marks for any 2)
b.
Macro-nutrients Micro-nutrients
Calcium Molybdenum
Nitrogen Manganese
Boron
(1 mark for each correct entry x 5 = 5 marks)
23.a. the lower the price the lower the supply the higher the price the higher
the supply for soya beans.
b. the higher price motivates soya bean farmers to increase production hence
supply increases while the lower price demotivates them hence supply
decreases.
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c. see graph;
key: - correct scaling for both axes = 1 mark
- correct plotting of supply figures = 1 mark
- correct plotting of demand figures = 1 mark
- labelling the graphs of supply and demand =1
mark
- accuracy = 1 mark
d. MK72/kg (+0.5 or-0.5 error can be allowed) (1 mark)
24. (i) spray race ( 1 mark)
(ii) - spraying is faster hence time saving
- less labour is required hence saves production costs
- acaricide wash is not wasted since it is recycled
- animals cannot swallow the acaricide wash hence no cases of poisoning
- animals do not get a shock hence suitable for pregnant and sick animals
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(2 marks for any 1)
(iii) - cleaning blocked nozzles
- replacing worn out floors
- cleaning the sump (a hole or hollow in which liquid waste collects)
regularly
- replacing broken rails
(1 mark for any 1)
25.a. to find out the effect of planting time on yield of maize (1 mark)
b. - early planted maize received more rains while the late planted maize used
less rain
- the early planted maize made use of nutrients before they leached while
the late planted maize were established after nutrients had leached.
- the early planted maize may have escaped pests and diseases while the
late planted maize were seriously attacked by pests and diseases.
(4 marks for any 2)
c. - amount of fertilizer applied
- time for application of fertilizer applied
- time for application of fertilizer
- type of maize variety
- size of land
- planting method
- type of maize variety
- size of land
- planting method
- location/site
- time of harvesting
- time of weeding
(1 mark for any 1)
d. farmers would ensure that they plant their crops early (1) to receive
sufficient rain water/make full use of nutrients (1).
26. (i) African swine fever
(ii) virus
(iii) - vaccination
- killing and burying infected animals
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- disinfecting pig houses before housing new stock
(1 mark for any 1)
27. - cultural methods: involve use of husbandry practices like correct plant
spacing to control aphids, crop rotation, field hygiene and rogueing off
- chemical methods: involve use of chemicals known as pesticides to kill pests
- physical methods: involve use of direct human efforts to pick and crush the
Pests
- biological methods: involve use of living things to control pests and diseases
e.g use of a ladybird beetle to control aphids
- legislative methods: involve use of laws and regulations put in place by
government to restrict transmission of pests and diseases from one area to
another.
- integrated methods: involve combining several methods to control pests
and diseases more efficiently
(4 marks for any 2)
28.a. - they are of higher nutritional value than exotic vegetables
- they are delicious
- they are more suitable to local environmental conditions
- they grow naturally without proper care
- some varieties have medicinal value e.g luni
- they can perform well in poor soils with lower fertility levels
- they are more resistant to diseases and pests
(2 marks for any 2)
b. it has more carbohydrates for fattening up broilers more quickly (1) so that
they are of good weight for slaughter(1)
c.-provide anchorage to crops
-provide nutrients to crops
(2 marks for any 2)
29. a. - construct furrows in the field made in such a way that water flows under
the force of gravity
- create channels from the water source to the furrows
- create a sluice gate at the end of the channel
- direct the water into the furrows by opening the sluice gate
(4 marks for 4 points presented in the order above)
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b. - large/plump
- whole/not broken/not damaged/not rotten
- viable/able to germinate
- pure to type
- high germination percentage
(1 mark for any 1)
30. - it reduces spoilage of food since it is kept in good quality storage facilities/
so that it is safe for human consumption
- it prevents food from being damaged by pests/ so that the population may
have food all the time
- it prevents loss of food through theft /so that people have food throughout
the year
- it helps to get prepared for misfortunes like drought, floods /so that the
food is distributed to affected areas
(2 marks for any 1)
31. - it promotes cooperation between the man and woman in all farming
activities (1)/since each contributed to the decision for the activity to be
done(1).
- it builds positive feeling of ownership of the enterprise (1)/hence both work
hard to produce more(1)
- it promotes a shared vision and responsibility for the enterprise (1) /because
both of them contributed to decision making necessary for the enterprise
to improve(1)
- the work on the farm is fairly distributed between men and women (1)/
resulting in timely farm operations(1)
- the resources like land and capital belong to both men and women (1)/hence
even the women can use the land(1)
- it motivates both genders to work hard and produce more yields (1) /since
they make a consultative decision on the activities to be done (1)
(10 marks for any 5)
32. - crop rotation: controls parasitic weeds by depriving them of their host
hence the weed dies.
- mulching: this covers the soil hence prevents weeds from receiving light.
- correct plant spacing: helps crops to form a canopy and shade weeds thus
preventing them from receiving light
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- early planting: crops get established and form a canopy before weeds
germinate and suppress weed growth.
- deep tillage: this buries weeds hence prevent them from germinating
before crops are established.
- mixed cropping: this ensures adequate soil cover hence preventing weeds
from receiving light.
- flooding in rice fields: this kill non-aquatic weeds by suffocation.
- correct fertilizer application: this ensures faster plant growth than weeds
which help to suppress weed growth.
(10 marks for any 5)
33. - it increases quantity of crop and livestock yields(1) /through use of
agrochemicals, irrigation, mechanical/scientific tools, seed, breeding and
feed technologies(1).
- it increases quality of crop and livestock yields(1)/ through use of storage,
farm structures, feed, seed and processing technologies(1).
- it ensures environmental conservation (1)/through use of conservation
farming technologies like strip cropping, crop rotation, box ridging and
minimum tillage(1).
- it increases profitability of the farm(1) /through use of scientific tools which
increase output per labour(1).
- it promotes efficient agricultural marketing(1) /through use of farm structure
technologies like roads and bridges which ensure easy and fast
transportation of produce to the market(1).
- it assist in farm management(1) /through use of computer and
communication technologies(1).
(10 marks for any 5)
END OF PROVISIONAL MARKING KEY
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