Fundamentals of Plant Nutrition MCQs Quiz 12

1. Well-aggregated soil enhances nutrient availability by improving _______

 Salt accumulation

 Soil acidity

 Root penetration

 Soil taxonomy

2. Poor soil tilth reduces nutrient efficiency due to _______

 Improved aeration

 High porosity

 High infiltration

 Restricted root growth

3. Micronutrient toxicity is most likely in _______ soils

 Saline

 Neutral

 Alkaline

 Acidic

4. Nutrient availability in soil is best described as _______

 Water-soluble pool

 Exchangeable pool

 Total nutrient concentration

 Plant-available fraction governed by chemical speciation

5. Soil organic matter reduces nutrient losses by _______

 Decreasing cation exchange capacity

 Increasing volatilization

 Increasing leaching

 Improving nutrient retention

6. Optimal nutrient availability occurs under _______ soil conditions

 Waterlogged and dense

 Well-structured and moist

 Sandy and dry

 Compacted and dry

7. Soil organic matter primarily acts as a _______

 Leaching agent

 Physical barrier

 Nutrient reservoir

 Soil pollutant

8. The primary biochemical reason microbes require nitrogen is for synthesis of _______

 Lipids

 Carbohydrates

 Proteins and nucleic acids

 Cellulose

9. Which nutrient shows the highest phloem mobility in plants?

 Nitrogen

 Calcium

 Iron

 Boron

10. Poor soil aeration can lead to accumulation of _______ in soil

 Oxygen

 Nitrogen gas

 Calcium

 Carbon dioxide

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Fundamentals of Plant Nutrition MCQs Quiz 12