Agricultural Science 2024 Jamb Examination
Agricultural Science 2024 Jamb Examination
Question 21
Which of the following processes will not lead to the loss of nutrients from the soil?
Mulching involves covering the soil surface with organic or inorganic materials, which helps retain moisture, reduce erosion, and prevent nutrient loss.
Leaching, harvesting, and erosion remove nutrients from the soil, whereas mulching conserves them.
Leaching, harvesting, and erosion remove nutrients from the soil, whereas mulching conserves them.
Not clear enough?
Question 22
Which of the following will not lead to loss of nitrogen compound from the soil?
Lodging, the bending over of stems due to wind or rain, does not directly remove nitrogen from the soil.
Burning, crop removal, and leaching result in nitrogen loss through combustion, uptake, or water movement.
Burning, crop removal, and leaching result in nitrogen loss through combustion, uptake, or water movement.
Not clear enough?
Question 23
The factors that affect the number and the activities of soil micro-organisms include the following except
Topography, not 'top biography', influences soil erosion and water movement but is not a direct factor affecting microbial activity.
Soil moisture, pH (acidity), and aeration directly impact microbial populations and their enzymatic activity.
Soil moisture, pH (acidity), and aeration directly impact microbial populations and their enzymatic activity.
Not clear enough?
Question 24
The diagram above illustrates a reproductive process in a farm animal, study the process and answer the questions:
The diagram represents the release of an egg from the ovary, which is ovulation.
Gestation is the period after fertilization, heat refers to the estrus cycle, and lactation is milk production post-birth.
Gestation is the period after fertilization, heat refers to the estrus cycle, and lactation is milk production post-birth.
Not clear enough?
Question 25
The most important factor that determines the rate of agricultural development in a country is the
The readiness of farmers to adopt research innovations is critical for agricultural development.
Even with machinery, herbicides, or raw materials, progress is limited without the adoption of effective technologies and practices.
Even with machinery, herbicides, or raw materials, progress is limited without the adoption of effective technologies and practices.
Not clear enough?
Question 26
Although clay soil is rich in nutrients, they are not good for most agricultural crop production because
Clay soils are often compact and poorly aerated, which limits root growth and microbial activity, affecting nutrient availability.
While they contain nutrients, physical properties make them less suitable for many crops.
While they contain nutrients, physical properties make them less suitable for many crops.
Not clear enough?
Question 27
The following are characteristics of quartz except
Quartz does not exhibit cleavage; it breaks with conchoidal fracture.
Quartz is granular, glass-like, and can have a shiny surface, making option A the exception.
Quartz is granular, glass-like, and can have a shiny surface, making option A the exception.
Not clear enough?
Question 28
Financial assistance from the government to the farmers is usually in the following forms except
Taxes are a financial obligation, not assistance.
Governments provide loans, credit, and subsidies to support farmers, whereas taxes reduce their financial resources.
Governments provide loans, credit, and subsidies to support farmers, whereas taxes reduce their financial resources.
Not clear enough?
Question 29
The replacement of traditional farming methods with modern methods is a step in agricultural
Adopting modern methods is part of agricultural development, as it involves improving efficiency, productivity, and technology use.
Expansion, education, or diversification are supportive but not the primary process.
Expansion, education, or diversification are supportive but not the primary process.
Not clear enough?
Question 30
In the nitrogen cycle, nitrite is oxidized to nitrate by
Nitrobacter bacteria oxidize nitrite (NO2-) to nitrate (NO3-) in the nitrogen cycle.
Nitrosomonas convert ammonium to nitrite, Azotobacter fixes atmospheric nitrogen, and Rhizobium fixes nitrogen in legumes.
Nitrosomonas convert ammonium to nitrite, Azotobacter fixes atmospheric nitrogen, and Rhizobium fixes nitrogen in legumes.
Not clear enough?
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