WAEC GCE 2017 Agric Science Theory Answers | Essay Questions

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1ai) unpredictable climate

i)Droughts or prolong periods without rain results in poor yields

ii)Flooding results in erosion

iii)Inadequate sunshine also reduces photosynthetic ability of plants

1aii) inadequate rural infrastructure

i)This results in urban drift ie massive exodus to big cities for better standard of living.

ii)Results to massive reduction in agricultural work force in rural settings

iii)Results in low agricultural production

1aiii)

Waec Gce 2017 Agric Science Theory Answers

Diseases

i)Result in increase in agricultural cost of production

ii)Reduce the quality of farm produce

iii)Reduce farmers income

1bi)

i)Contour ditch

ii)Border dyke

iii)Furrow irrigation

iv)Wild flooding

1bii)

i)High salt problems or salinity of soil which prevents proper growth of crops

ii)Transmissions of diseases is possible

iii)There is a build up and spread of pests

iv)Pollution of the environment is possible

v)There is high cost of equipment

2a)

i)Economic factor: most farmers are poor and cannot offered to buy machines such as tractors, plough, ridges,narrows, harvester

ii)Technical know-how;most farmers jack the required knowledge and skills to operate sophisticated machines

iii)small farm holdings ;is not economical for small scale farmers since it is very expensive to operate

2b)

i)piercing and sucking crop pests;these pest (mostly insects)have mouth parts that are modified and adapted for piercing and sucking plant tissues example of them are aphid, moths, cotton, strainers, cospid bug, mealy bug, cocoa thrip e.t.c

ii)biting and chewing crop pests;these are mostly vertebrates and invertebrates pests that posses strong mouth parts adapted to their mode feeding example are grasshopper, cricket, termites, army worm, Monkey, e.t.c

iii)boring crop pests;these are inside pests whose mouth parts are adopted for boring holes and destroying tissues of seeds stem and fruits example are weeds, stem, fruit fly and beetles.

READ: WAEC GCE 2017 Agricultural Science (Agric Practical) Specimens

3ai)

i)Long lactation periods

ii)Immunity and resistance from diseases

iii)Healthy variety

iv)Long life

3aii)

i)Camels

ii)Horses

3aiii)

i)It can perform more tedious jobs than man.

ii)It can handle many farm operations.

iii)It can be controlled or easy to operate.

iv)They are much stronger than man.

COMPLETE THE TABLE

3b)

Symptoms

i)angular spots on leaves

ii)death of shoots and rotting bolls

iii)distortion of leaves

iv)leaf curl

Control Measure

i)remove and burn infected plants

ii)grow resistant varieties

iii)spray with insecticides

iv)up root and burn infected plants

4a)

i)Sunlight

ii)Temperature

iii)Rain

iv)Water or Humidity

v)Soil or water chemistry

vi) pollution

4b)

i)green plants make use of the food they manufacture to produce seed and fruits

ii)dead an decayed plants and animals provide food for the saprophytic organisms

iii)seed produced by plants is used to reproduce another plant

iv)animals make use of the carbohydrate food produced by plants to get energy and fruit used as food

v)animals and plant produce carbohydrate(Co2) during respiration to enrich the atmosphere with Co2

4c)

spacing 40cm*40cm

but 100cm=1m

40cm/100=0.4m

spacing=0.4m*0.4m

spacing=0.16m

READ: 2024/2025 WAEC GCE Agricultural Science Obj/Theory Answers Now

4di)

i)Hemp

ii)Hoop-vine

iii)Nettles

iv)Ramie

4dii)

i)Tea

ii)Mate

iii)Kola

iv)Kava kava.

5ai)

i)beak

ii)oesophagus

iii)proventriculus

iv)Gizzard

v)Large Intestine

5aii)

i)The beak moistens food with Saliva.

ii)The oesophagus takes the food down to the crop to be stored.

iii)proventriculus mixes the food with acids and digestive enzymes.

iv)Gizzard always contains quantities of hard objects such as gravel or other grit that aids in the disintegration of food

v)Large Intestine is where the last of the water re-absorption occurs.

5b)

i)Lack of proper education of farmers

ii)Poverty does not allow people to join insurance

iii)The difficulty of paying farmers when they are due

iv)In attractiveness of insurance in west Africa

v)They seem to benefit only their stakeholders and not farmers

5c)

i)They are very expensive to operate

ii)They are only available to farmers who are Wealthy enough to own television and radio sets

iii)Farmers may find it difficult to ask questions on matters which they do not understand

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