Fundamentals of Plant Nutrition MCQs Quiz 2

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

 Direct involvement in metabolism

 Cannot be replaced by another element

 Deficiency prevents life cycle completion

 Essential for all plant species

2. Soil pH primarily influences nutrient availability by affecting _______

 Plant height

 Nutrient solubility

 Soil color

 Root length

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

 Sandy soil

 Loamy sand

 Clay soil

 Gravel soil

4. Sunlight is essential for photosynthesis because it provides _______

 Oxygen

 Carbon dioxide

 Energy

 Water

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

 Beneficial nutrient

 Macronutrient

 Micronutrient

 Essential nutrient

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

 Required only in trace amounts

 Enhances growth under stress conditions

 Indispensable for plant growth and reproduction

 Improves soil structure

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

 Phosphorus

 Nitrogen

 Potassium

 Silicon

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

 Magnesium

 Carbon

 Nitrogen

 Calcium

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

 Respire

 Absorb water

 Grow

 Photosynthesize

10. Water in photosynthesis is primarily used for _______.

 Transport

 Supporting structure

 Providing hydrogen and electrons

 Cooling leaves

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