Fertilizers have a formula written in a set of three figures $8-10-22$. What does it stand for?

  • A
    $\%$ of $Ca, Mg, P$
  • B
    $\%$ of $N, S, P$
  • C
    $\%$ of $N, P, K$
  • D
    $\%$ of $Fe, Mg, K$

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