What is the usefulness of $Mg^{2+}$ in plants?

  • A
    It is a constituent of the ring structure of chlorophyll.
  • B
    It activates enzymes of respiration and photosynthesis.
  • C
    It is involved in the synthesis of $DNA$ and $RNA$.
  • D
    All of the above.

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Sulfur is an important nutrient for the growth and productivity of which of the following crops?

Which of the following plays a prominent role in leaf growth?

$S$ - Statement: Sulfur is present in the structure of cysteine and methionine amino acids.
$R$ - Reason: Phosphorus does not participate in energy exchange processes.

Sulfur is an essential nutrient that significantly increases growth and productivity in which type of crops?

Which of the following statements are $NOT$ correct regarding calcium?

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