Fundamentals of Plant Nutrition MCQs Quiz 4

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

 Essential

 None of these

 Non-essential

 Toxic

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

 Iron

 Zinc

 Magnesium

 Manganese

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

 Calcium

 Sulfur

 Iron

 Phosphorus

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

 Dennis Robert Hoagland

 Daniel Israel Arnon

 Charles Darwin

 Justus von Liebig

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

 Nitrogen

 Boron

 Calcium

 Iron

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

 Reduces plant height only

 Can be corrected by another element

 Causes temporary wilting

 Prevents completion of the life cycle

7. Organic matter improves nutrient availability primarily by _______

 Increasing leaching

 Increasing Cation Exchange Capacity

 Decreasing water holding capacity

 Reducing microbial activity

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

 Essential nutrient

 Optional nutrient

 Conditional nutrient

 Supportive nutrient

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

 Calcium

 Potassium

 Phosphorus

 Nitrogen

10. Plant nutrients considered essential must satisfy _______

 Requirement for optimal yield alone

 Presence in large quantities

 Partial involvement in metabolism

 Indirect enhancement of plant growth

 Arnon and Stout criteria

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