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Question

Elements that are present in the plant body in excess of _______ of dry matter are known as Macro-nutrients.


A

8 mmol/kg

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B

7 mmol/kg

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C

10 mmol/kg

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D

5 mmol/kg

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Solution

The correct option is C

10 mmol/kg


Nutrients in plants are categorized into two broad categories based on the amount of these nutrients are required by the plants. A nutrient required by the plant is known as a macro-nutrient if the element is present in the plant's body in an excess of 10 mmol/kg of dry matter (matter obtained after removing the moisture and gases in the plant body). Similarly, elements present lesser than 10 mmol/kg of dry matter is known as micro-nutrients.


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