General Agriculture MCQs # 1

Welcome to your General Agriculture MCQs # 1

What is the first stable compound of carbon fixation in C4 plants?

A. 3-Phosphoglycerate (3-PGA)

B. Glyceraldehyde-3-phosphate (G3P)

C. Oxaloacetic acid (OAA)

D. Pyruvic acid

What is the most important property of Soil Colloids that makes them effective in Nutrient Retention?

A. Their heavy weight

B. Their neutral pH

C. Their negative charge

D. Their ability to absorb water

What is the main role of the Plant Hormone “Abscisic Acid (ABA)”?

A. Increasing cell division

B. Accelerating the process of flowering

C. Controlling the process during stress in the plant

D. Accelerating the process of fruit ripening

What process is called “Humification”?

A. Growth of plant roots

B. Storage of moisture in the soil

C. The process of forming humus by the decomposition of organic matter

D. Nitrogen evaporation from the soil

Which bacteria play an important role in nitrogen fixation in “Leguminous plants”?

A. Azotobacter

B. Nitrosomonas

C. Rhizobium

D. Pseudomonas

“Hydroponics” is a modern method of what?

A. Preparation of chemical fertilizers

B. Method of growing plants without soil

C. Water purification process

D. Process of making biological pesticides

Which organism is mainly used in “Vermicomposting”?

A. Bacteria

B. Fungi

C. Earthworm

D. Nematodes

What do “CAM (Crassulacean Acid Metabolism)” plants do at night?

A. Absorb sunlight

B. Absorb oxygen

C. Absorb carbon dioxide

D. Excrete water

What are “Chelating agents” used for in soil?

A. For drainage

B. To lower the pH of the soil

C. To improve the taste of edible crops

D. To make metals in the soil available to plants

What is the purpose of “Bt toxin” in Genetically Modified (GM) crops?

A. To absorb more water

B. To increase fruit size

C. To protect against pests

D. To increase nutrient content

What is the most prominent effect of the Plant Growth Regulator “Gibberellin”?

A. Shortening the roots of the plant

B. Flowering

C. Increasing the length of the plant (Stem Elongation)

D. Drying the leaves

What is the main goal of “Precision Agriculture”?

A. To get less yield on more land

B. To apply the same technique to every crop

C. To get more and better yield with limited resources

D. To promote only mechanized agriculture

What does “Allelopathy” mean in agricultural science?

A. Transfer of germs between plants

B. Chemical influence of one plant on the growth of another plant

C. The process of plants absorbing water

D. Release of toxic substances from the soil through the roots

What are the microorganisms in “Biofertilizers” used for?

A. To control soil temperature

B. To protect crops from diseases

C. To convert nutrients in the soil into an absorbable form

D. To improve crop color

“Evapotranspiration” is the combination of which two processes in agricultural science?

A. Water drainage and soil hardness

B. Rainfall and humidity

C. Evaporation and Transpiration

D. Oxygen release and water absorption

What is the main benefit of including Leguminous crops in crop rotation?

A. Providing moisture to the soil

B. Keeping soil temperature low

C. Increasing the amount of nitrogen in the soil

D. Increasing the length of roots

What is meant by “Threshold Level” in Integrated Pest Management (IPM)?

A. When the crop is fully mature

B. When the water table in the soil is low

C. The number of pests that require immediate control

D. The level at which fertilization should be stopped

What is a Tensiometer used for?

A. To measure the amount of fertilizer

B. To determine the hardness of the soil

C. To measure the availability of water in the soil

D. To determine the intensity of sunlight

What is the role of “Phytoalexins” in agriculture?

A. Growing plant roots

B. Creating aroma in the plant

C. Activating the plant’s defense system

D. Helping the plant absorb more water

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