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 361· Husbandry of field crops· WAEC
Maize is ready for harvest when the
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Answer: B. husks dry and the grains harden
Explanation and discussion
Question 362· Husbandry of field crops· WAEC
Which of these can be used as mulch?
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Answer: B. dry grass
Explanation and discussion
Question 363· Husbandry of field crops· JAMB
Earthing up in groundnut and potato production means
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Answer: B. heaping soil round the base of the plants
Explanation and discussion
Question 364· Husbandry of field crops· WAEC
Thinning in crop production means
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Answer: B. removing excess seedlings to give proper spacing
Explanation and discussion
Question 365· Husbandry of field crops· JAMB
Nursery beds are usually shaded in order to
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Answer: B. protect young seedlings from strong sun and heavy rain
Explanation and discussion
Question 366· Husbandry of field crops· JAMB
Pruning of cocoa trees helps to
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Answer: C. remove diseased branches and improve air flow
Explanation and discussion
Question 367· Husbandry of field crops· JAMB
Ridging land before planting yam mainly helps to
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Answer: D. loosen the soil for tuber expansion and improve drainage
Explanation and discussion
Question 368· Husbandry of field crops· WAEC
Maize is ready for harvest as green maize about
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Answer: D. 10 to 12 weeks after planting
Explanation and discussion
Question 369· Husbandry of field crops· WAEC
Cocoa seedlings are usually raised in a nursery under
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Answer: C. shade
Explanation and discussion
Question 370· Husbandry of field crops· JAMB
In most parts of southern Nigeria, maize is best planted
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Answer: A. at the beginning of the rainy season
Explanation and discussion
Question 371· Husbandry of field crops· JAMB
Maize planted at a spacing of 75 cm × 25 cm, one plant per stand, gives a plant population per hectare of about
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Answer: B. 53,333
Explanation and discussion
Question 372· Husbandry of field crops· JAMB
The recommended spacing for maize is about
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Answer: C. 75 cm × 25 cm
Explanation and discussion
Question 373· Husbandry of field crops· WAEC
Supplying in crop husbandry means
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Answer: B. replacing seeds that failed to germinate
Explanation and discussion
Question 374· Irrigation and drainage· JAMB
Infiltration is the
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Answer: A. entry of water into the soil surface
Explanation and discussion
Question 375· Irrigation and drainage· JAMB
Overhead irrigation can encourage
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Answer: B. leaf diseases because the foliage stays wet
Explanation and discussion
Question 376· Irrigation and drainage· WAEC
Excessive irrigation in dry areas can cause
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Answer: B. salinity of the soil
Explanation and discussion
Question 377· Irrigation and drainage· WAEC
A problem of irrigation in dry areas is
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Answer: B. salt build-up in the soil
Explanation and discussion
Question 378· Irrigation and drainage· WAEC
Drip (trickle) irrigation is efficient because it
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Answer: A. delivers water directly to the roots
Explanation and discussion
Question 379· Irrigation and drainage· JAMB
Basin irrigation is suitable for crops such as
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Answer: A. rice
Explanation and discussion
Question 380· Irrigation and drainage· WAEC
Shadoof irrigation lifts water using
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Answer: D. a pole, bucket and counterweight
Explanation and discussion

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JAMB and WAEC Agricultural Science questions

Maize is ready for harvest when the

Which of these can be used as mulch?

Earthing up in groundnut and potato production means

Thinning in crop production means

Nursery beds are usually shaded in order to

Pruning of cocoa trees helps to

Ridging land before planting yam mainly helps to

Maize is ready for harvest as green maize about

Cocoa seedlings are usually raised in a nursery under

In most parts of southern Nigeria, maize is best planted

Maize planted at a spacing of 75 cm × 25 cm, one plant per stand, gives a plant population per hectare of about

The recommended spacing for maize is about

Supplying in crop husbandry means

Infiltration is the

Overhead irrigation can encourage

Excessive irrigation in dry areas can cause

A problem of irrigation in dry areas is

Drip (trickle) irrigation is efficient because it

Basin irrigation is suitable for crops such as

Shadoof irrigation lifts water using