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 541· Soil formation and properties· WAEC
Soil formed from material deposited by rivers is
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Answer: C. alluvial soil
Explanation and discussion
Question 542· Soil formation and properties· JAMB
A soil that holds water well but is poorly aerated and sticky when wet is
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Answer: A. clay soil
Explanation and discussion
Question 543· Soil formation and properties· WAEC
The capacity of soil to hold water is greatest in
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Answer: A. clay soil
Explanation and discussion
Question 544· Soil formation and properties· JAMB
The deposition in the B horizon of materials washed down from the A horizon is
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Answer: D. illuviation
Explanation and discussion
Question 545· Soil formation and properties· WAEC
The best soil for most crops is
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Answer: C. loam
Explanation and discussion
Question 546· Soil formation and properties· JAMB
Soil texture refers to the
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Answer: A. relative proportions of sand, silt and clay
Explanation and discussion
Question 547· Soil formation and properties· WAEC
Physical weathering of rocks can be caused by
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Answer: D. changes in temperature
Explanation and discussion
Question 548· Soil formation and properties· JAMB
A soil sample contains 40% sand, 40% silt and 20% clay. It is best described as
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Answer: D. loam
Explanation and discussion
Question 549· Soil formation and properties· JAMB
The first stage in the formation of soil is the
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Answer: A. weathering of the parent rock
Explanation and discussion
Question 550· Soil formation and properties· JAMB
The ease with which water passes through a soil is its
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Answer: A. permeability
Explanation and discussion
Question 551· Soil formation and properties· JAMB
Soil structure refers to the
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Answer: A. arrangement of soil particles into aggregates
Explanation and discussion
Question 552· Soil formation and properties· WAEC
The type of soil water held so tightly round particles that plants cannot use it is
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Answer: B. hygroscopic water
Explanation and discussion
Question 553· Soil formation and properties· WAEC
The soil horizon that is darkest and richest in humus is the
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Answer: C. topsoil (A horizon)
Explanation and discussion
Question 554· Soil formation and properties· JAMB
Which of these is a biological agent of weathering?
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Answer: D. Plant roots and burrowing animals
Explanation and discussion
Question 555· Soil formation and properties· JAMB
Soil air is important to crops because it supplies
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Answer: D. oxygen for root respiration
Explanation and discussion
Question 556· Soil formation and properties· JAMB
Of the following, the soil particle with the largest size is
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Answer: C. sand
Explanation and discussion
Question 557· Soil formation and properties· JAMB
The capacity of soil to hold exchangeable cations is mainly due to
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Answer: A. clay and humus particles
Explanation and discussion
Question 558· Soil formation and properties· WAEC
A soil with good crumb structure has
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Answer: C. good aeration and drainage
Explanation and discussion
Question 559· Soil formation and properties· WAEC
A soil with large particles and large pore spaces that drains quickly is
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Answer: B. sandy soil
Explanation and discussion
Question 560· Soil formation and properties· WAEC
Earthworms improve the soil by
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Answer: D. mixing it and improving aeration and drainage
Explanation and discussion

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JAMB and WAEC Agricultural Science questions

Soil formed from material deposited by rivers is

A soil that holds water well but is poorly aerated and sticky when wet is

The capacity of soil to hold water is greatest in

The deposition in the B horizon of materials washed down from the A horizon is

The best soil for most crops is

Soil texture refers to the

Physical weathering of rocks can be caused by

A soil sample contains 40% sand, 40% silt and 20% clay. It is best described as

The first stage in the formation of soil is the

The ease with which water passes through a soil is its

Soil structure refers to the

The type of soil water held so tightly round particles that plants cannot use it is

The soil horizon that is darkest and richest in humus is the

Which of these is a biological agent of weathering?

Soil air is important to crops because it supplies

Of the following, the soil particle with the largest size is

The capacity of soil to hold exchangeable cations is mainly due to

A soil with good crumb structure has

A soil with large particles and large pore spaces that drains quickly is

Earthworms improve the soil by