Fundamentals of Plant Nutrition MCQs Quiz 2

1. Which of the following best describes the term “essential nutrient”?

 Required only in trace amounts

 Improves soil structure

 Enhances growth under stress conditions

 Indispensable for plant growth and reproduction

2. Which of the following is NOT part of Arnon and Stout criteria?

 Deficiency prevents life cycle completion

 Direct involvement in metabolism

 Cannot be replaced by another element

 Essential for all plant species

3. Soil pH primarily influences nutrient availability by affecting _______

 Soil color

 Plant height

 Nutrient solubility

 Root length

4. Water in photosynthesis is primarily used for _______.

 Providing hydrogen and electrons

 Transport

 Cooling leaves

 Supporting structure

5. Sunlight is essential for photosynthesis because it provides _______

 Carbon dioxide

 Oxygen

 Water

 Energy

6. Which element is considered essential due to its role in amino acid synthesis?

 Nitrogen

 Magnesium

 Carbon

 Calcium

7. If a plant lacks chlorophyll, it cannot _______.

 Absorb water

 Respire

 Grow

 Photosynthesize

8. ____________ soil has the highest cation exchange capacity (CEC)

 Sandy soil

 Gravel soil

 Loamy sand

 Clay soil

9. A nutrient directly involved in plant metabolism but not required for all species is classified as _______.

 Micronutrient

 Beneficial nutrient

 Essential nutrient

 Macronutrient

10. Which of the following elements is considered beneficial but not essential for all plants?

 Silicon

 Phosphorus

 Nitrogen

 Potassium

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