WAEC Agricultural Science 1992 Past Questions

Discuss the production of yam under the following headings : (a) materials of propagation; (b) soil requirement; (c) land preparation; (d) planting and spacing; (e) cultural practices (f) three major pests and their control.

Theory

Question 7

Which of the following is not a biotic factor affecting agricultural production?

A.predator
B.soil
C.parasites
D.pest
E.dieases

Objective

Question 7

(a) Name five breeds each of cattle and pig that can be found in Nigeria (b) State six general characteristics rabbits

Theory

Question 8

The effect of clearing agricultural lands clean of all vegetation and or trees include the following except

A.exposure of soil to erosion
B.compaction of soil
C.desertification
D.complete removal of soil nutrients
E.exposure of subsoil

Objective

Question 8

a) Name the causative agent of each of the following livestock diseases: (i) food and mouth; (ii) rinderpest; Newcastle (b) Name three animals that can be affected by each of the diseases listed in (a). (c) State fo symptoms of foot and mouth disease and three symptoms of each for rinderpest and Newcastle diseases

Theory

Question 9

Which of the following is not an advantage of drip-irrigation?

A.fertilizers can be applied through the system
B.there is reduction in the concentration of salt in the root zone
C.the system operates on a much lower line pressure than spinkler system
D.its efficiency on water distribution in steep slopes is poor
E.there is considerable maximization on use of water

Objective

Question 9

Discuss eight problems which an agricultural extension worker can face in the discharge of his duties.

Theory

Question 10

Chlorosis observed along the veins of leaves is a characteristic symptom for the deficiency of

A.nitrogen
B.magnesium
C.potassium
D.phosphorus
E.sulphur

Objective

Question 10

List and discuss four functions of a farm manager in a farm business.

Theory

Question 11

The removal of excess water from the soil surface and the upper subsoil is known as

A.irrigation
B.drainage
C.evaporation
D.surface turn-off
E.dehydration

Objective

Question 12

Which of the following is not an effect of manuring on the soil?

A.adding plant nutrients to the soil
B.releasing adequate plant nutrients of the appropriate time
C.facilitating soil aeration and movement of soil moisture
D.enhancing the activities of soil microorganisms
E.improving the structure of the soil

Objective

Question 13

A soil with low PH value can be improved by the addition of

A.ammonium sulphate
B.calcium carbonate
C.sodium chloride
D.sodium nitrate
E.magnesium phosphate

Objective

Question 14

Which of the following factors will cause etiolation in crops?

A.law humidity
B.high light intensity
C.high humidity
D.low temperature
E.absence of light

Objective

Question 15

Which of the following tools is the best for making seed beds?

A.hand fork
B.mattock
C.shovel
D.spade
E.axe

Objective

Question 16

The windmill is normally used as a source of power in

A.pumping well water
B.soil drainage
C.ridging
D.erosion control
E.seed broadcasting

Objective

Question 17

The most appropriate farm machinery for breaking soil is the

A.harrow
B.plough
C.ridger
D.tractor
E.cultivator

Objective

Question 18

An area of land where fruit trees are cultivated is commonly called

A.an orchard
B.a plantation
C.a nursery
D.an estate
E.a garden

Objective

Question 19

The natural grasslands of West Africa are generally located in the

A.sahel region
B.guinea savanna
C.mangrove area
D.equatorial region
E.deciduous forest

Objective

Question 20

Which of the following forest trees is a soft wood?

A.Mahogany
B.Teak
C.Shea-butter
D.Ebony
E.Gmelina

Objective

Question 21

Soil-borne diseases of crops can be effectively reduced by

A.terracing
B.crops rotation
C.liming
D.irrigation
E.mulching

Objective

Question 22

Gametes are produced through the process of

A.fusion
B.meiosis
C.mitosis
D.pollination
E.fertilization

Objective

Question 23

Which of the following is the most suitable raw material used in the production of pulp in paper industry?

A.Hardwood
B.Softwood
C.Heartwood
D.Sapwood
E.Plywood

Objective

Question 24

Which of the following explains the term pruning?

A.removal of unnecessary branches of trees crops
B.Adequate spacing of seedlings during transplanting
C.Removal of diseases or dead crops from the farm
D.hardening of seedlings in the nursery
E.Ripening of fruits before the development of embryo

Objective

Question 25

28. The freshly cut forage crops fed to livestock in their housing units are referred to as

A.paddock grazing
B.rotational grazing
C.silage
D.hay
E.soilage

Objective

Question 26

Which of the following plant diseases is not caused by fungus

A.Black arm
B.Rice blast
C.Rice smut
D.cassava leaf-spot
E.Maize rust

Objective

Question 27

Trees for lumbering will be regularly available in Nigerian forests if

A.there is an increase in annual rainfall
B.fertilizers are applied to trees
C.timber is no longer used for construction purposes
D.a tree is planted for everyone felled
E.wood is no longer used as fuel

Objective

Question 28

The side effects of the various preventive and control measures of pests and diseases of crops include the following except

A.environmental pollution
B.poisoning of wildlife
C.disruption of the ecosystem
D.improvement in the quality of farm produce
E.exposure of the farmer to health hazards

Objective

Question 29

Which of the following parts of plants are normally used for vegetative propagation?

A.stem, root and seed
B.stem, root and flower
C.fruit, leaf and root
D.leaf, flower and stem
E.stem, root and leaf

Objective

Question 30

The correct sequence in preparing new land for cropping is usually

A.stumping, laying out of farm, ridging and tiling
B.laying out of farm, ridging, stumping and tilling
C.tilling, stumping, laying out of farm
D.ridging, laying out of farm, tilling and stumping
E.laying out of farm, stumping, tilling and ridging.

Objective

Question 31

Which of the following methods would quickly provide a large harvest of oranges from a tree with desirable qualities?

A.planting the seeds of the plant with the desirable qualities
B.Crossing orange trees with those of desirable qualities
C.Applying special fertilizer to the other citrus trees
D.Grafting a branch from the tree with desirable qualities to the stock of other citrus trees
E.Planting the stem cuttings of the orange tree with desirable qualities