Fundamentals of Plant Nutrition MCQs Quiz 4

1. Which nutrient is essential due to its role in cell wall formation?

 Phosphorus

 Calcium

 Potassium

 Nitrogen

2. The concept of essentiality in plant nutrition was first clearly defined by _______

 Daniel Israel Arnon

 Justus von Liebig

 Dennis Robert Hoagland

 Charles Darwin

3. If a plant completes its life cycle without a specific element, that element can be categorised as _______.

 Essential

 None of these

 Toxic

 Non-essential

4. Organic matter improves nutrient availability primarily by _______

 Increasing Cation Exchange Capacity

 Increasing leaching

 Reducing microbial activity

 Decreasing water holding capacity

5. A plant showing yellowing (chlorosis) of older leaves first is most likely deficient in which nutrient?

 Iron

 Calcium

 Nitrogen

 Boron

6. Which of the following is an essential micronutrient involved in redox reactions?

 Calcium

 Iron

 Phosphorus

 Sulfur

7. According to essentiality criteria, a nutrient is essential if its deficiency _______.

 Can be corrected by another element

 Causes temporary wilting

 Reduces plant height only

 Prevents completion of the life cycle

8. Which nutrient is essential because it forms part of chlorophyll?

 Zinc

 Magnesium

 Iron

 Manganese

9. Plant nutrients considered essential must satisfy _______

 Presence in large quantities

 Requirement for optimal yield alone

 Arnon and Stout criteria

 Partial involvement in metabolism

 Indirect enhancement of plant growth

10. A nutrient satisfying all three essentiality criteria is termed _______

 Essential nutrient

 Optional nutrient

 Conditional nutrient

 Supportive nutrient

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