Agricultural Science JAMB, WAEC, NECO AND NABTEB Official Past Questions

43

Which of the following crops produces latex?

  • A. mango
  • B. citrus
  • C. rubber
  • D. sisal
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44

Which of the following crops is bet harvested using a combine harvester?

  • A. maize
  • B. groundnut
  • C. cassava
  • D. cotton
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45

Which of the following statements about mulches is true? They

  • A. include paper and plolythene sheets
  • B. encourage weed growth
  • C. facilitates hardpan formation
  • D. decrease soil biotic population
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46

A disadvantage of vegetatively propagated crops is that they

  • A. do not mature on time
  • B. are less resistant to diseases
  • C. do not withstand harsh conditions
  • D. lodge very readily
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47

The term hermetic storage of grains means keeping grains in

  • A. air-tight containers
  • B. jute bags
  • C. silos
  • D. rhumbus
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48

If a crop is planted at a spacing of 100cm x 50cm. Calculate the plant population required for an hectare of farm land.

  • A. 200
  • B. 2,000
  • C. 5,000
  • D. 20,000
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49

In crop rotation, deep-rooted crops should follow shallow-rooted crops because deep-rooted crops

  • A. are resistant to diseases
  • B. are early-maturing
  • C. feed from different soil layers
  • D. attract different kinds of pests
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50

A bag of fertilizer had a ratio of 0:10:0 written on it. This means that the fertilizer contains

  • A. 0 kg of nitrogen, 10 kg of potash and 0 kg of phosphate
  • B. 0 kg of phosphate, 10 kg of nitrogen and 0 kg of potash
  • C. 0 kg of nitrogen, 10 kg of phosphate and 0 kg of potash
  • D. 0 kg of potash, 10 kg of phosphate and 0 kg of nitrogen
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51

A well fermented and dried coffee seed is said to be

  • A. parched
  • B. graded
  • C. winnowed
  • D. threshed
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52

Bush fallowing is necessitated by

  • A. population increase
  • B. reduction in soil fertility
  • C. cost consideration
  • D. rural-urban migration
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53

Farm surveying is important because it determines

  • A. soil fertility
  • B. size of farmland
  • C. yield of crops
  • D. types of implement to use
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54

Which of the following equipment is not used in farm surveying?

  • A. Gunter's chain
  • B. measuring tape
  • C. ranging pole
  • D. pick axe
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55

Mechanization is difficult to practice where the

  • A. land is fragmented
  • B. farmer is wealthy
  • C. farm holding is large
  • D. soil fertility is low
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56

The greatest disadvantage of using a bulldozer in land clearing is that it

  • A. removes the fertile top soil along with the vegetation
  • B. makes the soil lose its texture
  • C. allows the fast growth of weeds after clearing
  • D. increases the incidence of pests
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57

The best source of farm power for agricultural production is

  • A. human power
  • B. animal power
  • C. mechanical power
  • D. solar power
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58

The removal of excess water from the sub-soil is known as

  • A. irrigation
  • B. drainage
  • C. evaporations
  • D. dehydration
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59

Which of the following statements indicate advantages of sub-surface irrigation? I. Low operation cost once established II. Does not disturb the movement of implements III. Permits efficient use of water IV. easily floods the field

  • A. I,II and III only
  • B. II,III and IV only
  • C. I,II and IV only
  • D. I,II,III and IV
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60

Which of the following fertilizers should be applied for good plant growth after prolonged use of sulphate of ammonia on a neutral soil?

  • A. ammonium nitrate
  • B. lime
  • C. urea
  • D. single superphosphate
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61

Controlled burning has the advantage of

  • A. increasing the number of soil organisms
  • B. inducing re-growth of pasture grasses
  • C. increasing the amount of nutrients in the soil
  • D. improving soil structure
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62

The atmosphere gains carbon dioxide through the following ways except

  • A. burning of fuel such as coal and wood
  • B. respiration by plants and animals
  • C. photosynthesis in plants
  • D. death and decay of plants and animals
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63

Magnesium deficiency in crops can be corrected by the application of

  • A. dolomite
  • B. limestone
  • C. quicklime
  • D. urea
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