Understanding Plant Nutrients, Mobility & Deficiency

Which best represents the primary role of nitrogen?

• leaf and stem growth

• root system development

• flower production

• assists with absorption of water

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Which best represents the main function of phosphorus?

• leaf and stem growth

• root system development and seed production

• flower production

• formation of amino acids

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Which best represents the role of potassium?

• important for photosynthesis

• build immunity and regulate CO2 intake

• root development

• leaf and stem growth

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How do carbon and oxygen primarily enter plants?

• Through the roots as dissolved minerals

• Through the leaves as carbon dioxide

• Through the roots as water

• Through the leaves as oxygen gas

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What is the main difference between macronutrients and micronutrients in plants?

• Macronutrients are needed in smaller amounts than micronutrients

• Macronutrients are needed in larger amounts than micronutrients

• Macronutrients are only needed during fruit development

• Micronutrients are only needed during early growth

How do we compare mobile nutrients to immobile nutrients?

• immobile nutrients move throughout the plant while mobile are locked

• mobile nutrients are needed in small amounts while immobile nutrients are needed in larger amounts

• mobile nutrients move throughout the plant while immobile are locked

• mobile nutrients are needed in laarge amounts while immobile nutrients are needed in smaller amounts

Why might a nutrient deficiency show up in new growth rather than older growth?

• Because new growth is more exposed to environmental factors

• Because immobile elements cannot move to new growth

• Because mobile elements are more concentrated in new growth

• Because new growth requires less nutrients

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Explain why nutrient deficiencies are often revealed during periods of high nutrient demand such as fruit development.

• Because plants stop absorbing nutrients during fruit development

• Because nutrient uptake is highest during early growth

• Because the demand for nutrients exceeds the supply during these periods

• Because soil nutrients are more abundant during fruit development

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A plant shows deficiency symptoms in its older leaves. What does this indicate about the mobility of the deficient nutrient?

• The nutrient is immobile

• The nutrient is mobile

• The nutrient is not essential

• The nutrient is only needed in small amounts

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Describe a scenario where a nutrient is present in the soil but still unavailable to the plant.

• The soil is too dry for nutrient uptake

• The soil has a balanced pH

• The plant is in a dormant state

• The soil temperature is optimal for growth

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