Agricultural Science 2022 Jamb Examination
Agricultural Science 2022 Jamb Examination
Question 31
The vertical section of the soil showing series of horizontal layers of different types of soil is called
A soil profile is the vertical section of soil that shows all its horizons or layers from the surface down to the underlying material. It helps in studying soil composition, structure, and fertility. Soil texture, layers, and type refer to other properties but do not capture the full vertical sequence of layers.
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Question 32
The A-Horizon of soil profile is also called the
The A-Horizon is the topmost layer of the soil profile, commonly referred to as topsoil. It is rich in organic matter and nutrients, making it essential for plant growth. Sub-soil, parent material, and bedrock lie beneath the topsoil and serve different roles.
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Question 33
The B-Horizon of soil profile is also called the
The B-Horizon is the subsoil layer beneath the topsoil. It contains accumulated minerals leached from the topsoil and provides structural support and nutrients to deep-rooted plants. Topsoil, parent material, and bedrock are found in different horizons and have distinct functions.
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Question 34
____________ is said to occur when a ration does not provide all the food nutrients in adequate quantities needed by animal.
Malnutrition occurs when an animal does not receive sufficient nutrients in the correct proportions, leading to deficiency diseases, reduced growth, or poor productivity. The other options are incorrect terms and do not accurately describe the condition.
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Question 35
The feed that is regularly offered to or consumed by the animal is called
A ration refers to the daily allowance of feed provided to an animal to meet its nutritional requirements. Ratio refers to proportion, nutrients are components of feed, and content is a general term that does not define daily feeding.
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Question 36
Which of the following type of rations will supplies the animal with just the quantity of nutrients that are enough to enable the animal carry on with vital body activities without losing or gaining another substance
A maintenance ration provides only the amount of nutrients required for basic body functions such as respiration, circulation, and thermoregulation, without contributing to growth or production. Production rations and balanced rations exceed maintenance needs, while measured ration is a general term for calculated feed.
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Question 37
The quantity of ration that can supply the requirement nutrients above the maintenance to enable the animal produce the form of animal product for which the livestock is kept is known as
A production ration supplies nutrients beyond maintenance needs to support the production of meat, milk, eggs, or wool. Maintenance ration only supports vital functions. Balanced ration ensures all nutrient requirements are met in correct proportions, and measured ration refers to the quantity given, not its purpose.
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Question 38
Which of the following classes of nutrient is used only for energy production in farm animals?
Carbohydrates are primarily a source of energy for animals. While fats and oils also provide energy, carbohydrates are metabolised more directly for energy production. Proteins are mainly for tissue repair and growth, and minerals play regulatory and structural roles.
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Question 39
________ is a disease condition which emanates from inadequate nutrition.
Nutritional deficiency arises when an animal's diet lacks essential nutrients, leading to poor health, reduced productivity, or disease. Nutritional adequacy and sufficiency indicate proper nutrition, while efficiency refers to nutrient utilisation rather than disease.
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Question 40
Preservation of fish prevents the following except
Preservation methods, such as refrigeration, salting, or smoking, prevent injury, spoilage, and destruction of fish by delaying decomposition and microbial activity. Processing is a separate activity that involves preparing fish for consumption or storage and is not prevented by preservation.