Fundamentals of Plant Nutrition MCQs Quiz 4

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

 Calcium

 Phosphorus

 Iron

 Sulfur

2. Plant nutrients considered essential must satisfy _______

 Partial involvement in metabolism

 Presence in large quantities

 Arnon and Stout criteria

 Requirement for optimal yield alone

 Indirect enhancement of plant growth

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

 Essential nutrient

 Conditional nutrient

 Optional nutrient

 Supportive nutrient

4. Organic matter improves nutrient availability primarily by _______

 Increasing Cation Exchange Capacity

 Reducing microbial activity

 Decreasing water holding capacity

 Increasing leaching

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

 Calcium

 Boron

 Iron

 Nitrogen

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

 Iron

 Zinc

 Manganese

 Magnesium

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

 None of these

 Non-essential

 Toxic

 Essential

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

 Charles Darwin

 Dennis Robert Hoagland

 Daniel Israel Arnon

 Justus von Liebig

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

 Can be corrected by another element

 Prevents completion of the life cycle

 Causes temporary wilting

 Reduces plant height only

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

 Phosphorus

 Calcium

 Nitrogen

 Potassium

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