Fundamentals of Plant Nutrition MCQs Quiz 7

1. Diffusion is the main transport mechanism for which nutrients?

 Phosphorus and potassium

 Nitrogen and sulfur

 Calcium and magnesium

 Sodium and chloride

2. Root interception contributes to nutrient uptake by _______

 Direct root contact with nutrients

 Gas exchange

 Microbial breakdown

 Transport via water

3. In fine-textured soils, nutrient retention is generally higher because of _______.

 High surface area

 High infiltration

 Low organic matter

 Low porosity

4. In a nutrient omission study, plants fail to produce viable seeds. This indicates the nutrient is __________________

 Beneficial

 Toxic

 Essential

 Non-essential

5. Waterlogged soils promote nutrient loss through _______

 Fixation of potassium

 Volatilization of phosphorus

 Denitrification of nitrogen

 Leaching of calcium

6. Soil moisture influences nutrient availability primarily by affecting _______.

 Soil texture

 Bulk density

 Soil color

 Nutrient mobility

7. Mass flow is the dominant mechanism for movement of _______

 Potassium

 Zinc

 Phosphorus

 Nitrate nitrogen

8. Well-aerated soils favor which nitrogen transformation?

 Nitrification

 Volatilization

 Immobilization

 Denitrification

9. Clay soils may reduce nutrient availability under poor aeration due to _______

 Nutrient fixation

 Erosion

 Volatilization

 Leaching

10. The essentiality of nutrients is fundamentally linked to _______.

 Biochemical function

 Plant genetics

 Soil type

 Climate conditions

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