JAMB Agricultural Science questions

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

All topics Agricultural economics and extension · 22 Animal pests and diseases · 20 Animal reproduction and nutrition · 20 Classification and anatomy of farm animals · 19 Crop classification and propagation · 18 Crop pests and diseases · 20 Farm tools and mechanisation · 17 Fisheries and aquaculture · 17 Forestry · 15 Husbandry of field crops · 22 Irrigation and drainage · 18 Livestock management · 19 Meaning and importance of agriculture · 19 Soil fertility, manures and fertilisers · 24 Soil formation and properties · 21 Weeds and weed control · 15

Question 281· Soil formation and properties· JAMB
Soil texture refers to the
Explanation and discussion
Question 282· Soil formation and properties· JAMB
A soil sample contains 40% sand, 40% silt and 20% clay. It is best described as
Explanation and discussion
Question 283· Soil formation and properties· JAMB
The first stage in the formation of soil is the
Explanation and discussion
Question 284· Soil formation and properties· JAMB
The ease with which water passes through a soil is its
Explanation and discussion
Question 285· Soil formation and properties· JAMB
Soil structure refers to the
Explanation and discussion
Question 286· Soil formation and properties· JAMB
Which of these is a biological agent of weathering?
Explanation and discussion
Question 287· Soil formation and properties· JAMB
Soil air is important to crops because it supplies
Explanation and discussion
Question 288· Soil formation and properties· JAMB
Of the following, the soil particle with the largest size is
Explanation and discussion
Question 289· Soil formation and properties· JAMB
The capacity of soil to hold exchangeable cations is mainly due to
Explanation and discussion
Question 290· Soil formation and properties· JAMB
Soil air is important because it
Explanation and discussion
Question 291· Soil formation and properties· JAMB
Which soil horizon is called the zone of accumulation?
Explanation and discussion
Question 292· Weeds and weed control· JAMB
Striga (witchweed) is a weed that
Explanation and discussion
Question 293· Weeds and weed control· JAMB
A herbicide applied to the soil before the crop or weeds emerge is a
Explanation and discussion
Question 294· Weeds and weed control· JAMB
Post-emergence herbicides are applied
Explanation and discussion
Question 295· Weeds and weed control· JAMB
Herbicides that kill some plants but leave others unharmed are
Explanation and discussion
Question 296· Weeds and weed control· JAMB
Which of these is a mechanical method of weed control?
Explanation and discussion
Question 297· Weeds and weed control· JAMB
Weeds that complete their life cycle in one season are
Explanation and discussion
Question 298· Weeds and weed control· JAMB
A selective herbicide is one that
Explanation and discussion
Question 299· Weeds and weed control· JAMB
Spear grass (Imperata cylindrica) is difficult to control because it
Explanation and discussion
Question 300· Weeds and weed control· JAMB
Weeds harm crops indirectly by serving as alternate hosts for
Explanation and discussion

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JAMB Agricultural Science questions

Soil texture refers to the

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

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

Soil air is important because it

Which soil horizon is called the zone of accumulation?

Striga (witchweed) is a weed that

A herbicide applied to the soil before the crop or weeds emerge is a

Post-emergence herbicides are applied

Herbicides that kill some plants but leave others unharmed are

Which of these is a mechanical method of weed control?

Weeds that complete their life cycle in one season are

A selective herbicide is one that

Spear grass (Imperata cylindrica) is difficult to control because it

Weeds harm crops indirectly by serving as alternate hosts for