JAMB and WAEC Agricultural Science questions

597 questions with answers and explanations. Tap an option to check yourself.

All topics Agricultural economics and extension · 41 Animal pests and diseases · 38 Animal reproduction and nutrition · 38 Classification and anatomy of farm animals · 37 Crop classification and propagation · 36 Crop pests and diseases · 39 Farm tools and mechanisation · 35 Fisheries and aquaculture · 35 Forestry · 33 Husbandry of field crops · 41 Irrigation and drainage · 36 Livestock management · 37 Meaning and importance of agriculture · 36 Soil fertility, manures and fertilisers · 43 Soil formation and properties · 39 Weeds and weed control · 33

Question 481· Meaning and importance of agriculture· WAEC
Which of these is a role of agriculture in Nigeria's economy?
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Answer: B. providing raw materials for industries
Explanation and discussion
Question 482· Meaning and importance of agriculture· JAMB
Which of the following is a contribution of agriculture to the Nigerian economy?
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Answer: C. Provision of raw materials for industries
Explanation and discussion
Question 483· Soil fertility, manures and fertilisers· JAMB
Liming an acidic soil helps to
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Answer: C. raise the soil pH
Explanation and discussion
Question 484· Soil fertility, manures and fertilisers· JAMB
Repeated use of ammonium sulphate fertiliser tends to make the soil
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Answer: B. more acidic
Explanation and discussion
Question 485· Soil fertility, manures and fertilisers· WAEC
Single superphosphate fertiliser supplies mainly
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Answer: C. phosphorus
Explanation and discussion
Question 486· Soil fertility, manures and fertilisers· JAMB
Bush fallowing restores soil fertility by
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Answer: D. letting natural vegetation add organic matter over time
Explanation and discussion
Question 487· Soil fertility, manures and fertilisers· WAEC
Which nutrient do crops need in the largest amount for leafy growth?
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Answer: B. nitrogen
Explanation and discussion
Question 488· Soil fertility, manures and fertilisers· WAEC
Fertiliser placed in a ring round a tree crop such as cocoa is applied by
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Answer: C. ring application
Explanation and discussion
Question 489· Soil fertility, manures and fertilisers· WAEC
In the nitrogen cycle, lightning helps to
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Answer: D. fix atmospheric nitrogen as oxides that rain brings to the soil
Explanation and discussion
Question 490· Soil fertility, manures and fertilisers· WAEC
Organic manure includes
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Answer: A. farmyard manure
Explanation and discussion
Question 491· Soil fertility, manures and fertilisers· WAEC
Farmyard manure improves soil by
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Answer: B. adding nutrients and improving structure
Explanation and discussion
Question 492· Soil fertility, manures and fertilisers· JAMB
A bag of NPK 15:15:15 fertiliser contains
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Answer: D. equal percentages of nitrogen, phosphorus and potassium
Explanation and discussion
Question 493· Soil fertility, manures and fertilisers· JAMB
Which of the following is an organic manure?
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Answer: C. Farmyard manure
Explanation and discussion
Question 494· Soil fertility, manures and fertilisers· WAEC
Green manure is
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Answer: A. green plants ploughed into the soil while still fresh
Explanation and discussion
Question 495· Soil fertility, manures and fertilisers· JAMB
Growing legumes in a rotation improves soil fertility because legumes
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Answer: D. fix atmospheric nitrogen through bacteria in their root nodules
Explanation and discussion
Question 496· Soil fertility, manures and fertilisers· WAEC
Soil fertility is reduced by
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Answer: B. continuous cropping without fertiliser
Explanation and discussion
Question 497· Soil fertility, manures and fertilisers· JAMB
Green manuring involves
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Answer: C. ploughing in a growing crop, usually a legume, to enrich the soil
Explanation and discussion
Question 498· Soil fertility, manures and fertilisers· JAMB
Compost is made by
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Answer: A. allowing plant and animal wastes to decompose in a heap or pit
Explanation and discussion
Question 499· Soil fertility, manures and fertilisers· JAMB
Placing fertiliser in a band beside the crop row is
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Answer: C. side placement
Explanation and discussion
Question 500· Soil fertility, manures and fertilisers· JAMB
Applying too much nitrogen fertiliser to maize can cause
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Answer: D. lodging and excessive leafy growth
Explanation and discussion

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JAMB and WAEC Agricultural Science questions

Which of these is a role of agriculture in Nigeria's economy?

Which of the following is a contribution of agriculture to the Nigerian economy?

Liming an acidic soil helps to

Repeated use of ammonium sulphate fertiliser tends to make the soil

Single superphosphate fertiliser supplies mainly

Bush fallowing restores soil fertility by

Which nutrient do crops need in the largest amount for leafy growth?

Fertiliser placed in a ring round a tree crop such as cocoa is applied by

In the nitrogen cycle, lightning helps to

Organic manure includes

Farmyard manure improves soil by

A bag of NPK 15:15:15 fertiliser contains

Which of the following is an organic manure?

Green manure is

Growing legumes in a rotation improves soil fertility because legumes

Soil fertility is reduced by

Green manuring involves

Compost is made by

Placing fertiliser in a band beside the crop row is

Applying too much nitrogen fertiliser to maize can cause