A comprehensive list of Agricultural science questions with answers to help you prepare for JAMB, WAEC, NECO, Post UTME exams.
The effects of practicing crop rotation include the following except
Maintaining and improving soil fertility
Controlling soil erosion
Adding humus to the soil
Preventing the build-up of pests and diseases
Correct answer is C
Crop rotation does not add humus to the soil.
What factors influence soil fertility in agriculture?
pH and soil structure
Organic matter content and nutrient availability
Soil texture and drainage
All of the above
Correct answer is D
Soil fertility is influenced by a variety of factors including organic matter content, nutrient availability, pH, soil structure, soil texture, and drainage. Organic matter content and nutrient availability provide the necessary nutrients for plant growth. pH affects the availability of nutrients in the soil. Soil structure affects the soil's ability to hold and supply water, air, and nutrients to plants. Soil texture affects the soil's physical properties and its ability to hold and supply water, air, and nutrients to plants. Drainage affects the soil's ability to supply sufficient water to plants without waterlogging the roots.
Which of the following is an example of a biotic factor in an agricultural ecosystem?
Rainfall
Soil pH
Temperature
Crop pests
Correct answer is D
Biotic factors in an agricultural ecosystem refer to the living organisms or biological components that influence the dynamics of the ecosystem. These factors can include plants, animals, microorganisms, and other living organisms that interact with agricultural crops. Crop pests, such as insects, rodents, and pathogens, are examples of biotic factors that can have a significant impact on agricultural systems.
Which easily drained
Is well aerated
Can produce a good harvest of cowpea
Contain all essential plant nutrients in suitable proportion
Correct answer is D
Fertile soil is one which contains all the plant nutrients in the right proportion.
A fertile soil will contain all the major nutrients for basic plant nutrition (e.g nitrogen, phosphorus and potassium), as well as other nutrients needed in smaller quantities (e.g calcium, magnesium, sulfur, ion e.t.c).
Which of the following is NOT an agent of pollination in plants?
Bees
Wind
Water
Fungi
Correct answer is D
Pollination is the process by which pollen grains are transferred from the male reproductive organs to the female reproductive organs of a plant, enabling fertilization and seed production. Various agents can facilitate pollination, including animals, wind, and water.
Which of the following is an example of agricultural technology?
Crop rotation
Irrigation
Organic farming
Composting
Correct answer is B
Irrigation is an example of agricultural technology. It involves the artificial application of water to agricultural fields to supplement natural rainfall. Irrigation systems can range from simple methods like surface irrigation to more advanced techniques like drip irrigation or sprinkler systems.
Which of the following is NOT a component of agronomy?
Pest management
Crop production
Soil management
Animal husbandry
Correct answer is D
Agronomy is a branch of agriculture that focuses on crop production and the management of agricultural systems. It involves various aspects related to growing and cultivating crops. The main components of agronomy include crop production, soil management, and pest management.
The type of soil with a particle size of 0.02 to 0.002mm is
Clay
Silt
Fine sand
Coarse sand
Correct answer is B
Fine sand → 0.2mm - 0.02mm
Silt particles → 0.02mm - 0.002mm
Clay particles → less than 0.002mm
The study of crop production and soil management
The study of animal breeding and genetics
The study of agricultural machinery and equipment
The study of plant diseases and pest control
Correct answer is A
Agronomy is a branch of agriculture that focuses on the science and technology of crop production and soil management. It involves the study of various aspects related to the growth, development, and management of agricultural crops.
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