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.