Agricultural science WAEC past questions and answers

Agricultural science WAEC past questions and answers

Question: What is the process by which green plants make their own food using sunlight?

a) Respiration

b) Photosynthesis

c) Transpiration

d) Germination

Answer: b) Photosynthesis

Question: Which of the following is a primary macronutrient essential for plant growth?

a) Iron

b) Nitrogen

c) Zinc

d) Copper

Answer: b) Nitrogen

Question: What is the main function of the stomata in plant leaves?

a) Absorption of water

b) Photosynthesis

c) Transpiration

d) Root development

Answer: c) Transpiration

Question: Which agricultural practice involves the cultivation of crops in distinct rows to maximize space and resources?

a) Crop rotation

b) Polyculture

c) Intercropping

d) Monoculture

Answer: d) Monoculture

Question: What is the term for the decay of organic matter by microorganisms, resulting in the formation of nutrient-rich humus?

a) Erosion

b) Decomposition

c) Fermentation

d) Pollination

Answer: b) Decomposition

Question: Which agricultural practice involves alternating the type of crops planted in a specific field over different seasons?

a) Monoculture

b) Crop rotation

c) Intercropping

d) Agroforestry

Answer: b) Crop rotation

Question: What is the primary purpose of adding fertilizers to soil in agriculture?

a) Weed control

b) Pest management

c) Soil fertility improvement

d) Irrigation

Answer: c) Soil fertility improvement

Question: Which of the following is a common method of weed control that involves turning over the soil to bury weeds and disrupt their growth?

a) Mulching

b) Tilling

c) Herbicide application

d) Crop rotation

Answer: b) Tilling

Question: What is the term for the process of breeding and raising animals for human use, typically for food, leather, or wool?

a) Horticulture

b) Apiculture

c) Animal husbandry

d) Silviculture

Answer: c) Animal husbandry

Question: Which of the following is a method of plant propagation that involves using a part of a parent plant to grow a new one?

a) Grafting

b) Hydroponics

c) Tissue culture

d) Germination

Answer: a) Grafting

Question: What is the role of mycorrhizal fungi in plant growth?

a) Pathogen protection

b) Nitrogen fixation

c) Water absorption

d) Nutrient uptake

Answer: d) Nutrient uptake

Question: Which of the following is a greenhouse gas released from the digestion of ruminant animals?

a) Methane

b) Carbon dioxide

c) Nitrous oxide

d) Ozone

Answer: a) Methane

Question: What is the term for the practice of growing two or more crops simultaneously in the same field to maximize yield and reduce risks?

a) Monoculture

b) Crop rotation

c) Intercropping

d) Agroecology

Answer: c) Intercropping

Question: Which type of soil has the smallest particles and retains water and nutrients effectively?

a) Sandy soil

b) Clay soil

c) Loamy soil

d) Silt soil

Answer: b) Clay soil

Question: What is the process of transferring pollen from the male to the female part of a flower called?

a) Fertilization

b) Pollination

c) Germination

d) Photosynthesis

Answer: b) Pollination

Question: Which of the following is an example of a cover crop used for soil improvement?

a) Wheat

b) Clover

c) Rice

d) Barley

Answer: b) Clover

Question: What is the term for the controlled burning of vegetation to clear land for agricultural purposes?

a) Irrigation

b) Deforestation

c) Slash-and-burn

d) Mulching

Answer: c) Slash-and-burn

Question: Which agricultural practice involves the deliberate breeding of plants to express desired traits?

a) Genetic modification

b) Organic farming

c) Selective breeding

d) No-till farming

Answer: c) Selective breeding

Question: What is the primary purpose of crop rotation in agriculture?

a) Pest control

b) Weed management

c) Soil fertility preservation

d) Water conservation

Answer: c) Soil fertility preservation

Question: Which of the following is an example of a leguminous crop that contributes to nitrogen fixation in the soil?

a) Corn

b) Soybeans

c) Wheat

d) Rice

Answer: b) Soybeans