Multiple choice

Which of the following elements form primary macronutrients of soil?

  1. C, O & He

  2. O, Cu & C

  3. K, P & N

  4. Bo, Zn & Mn

  5. C, H and O
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 K, P & N are the three main macronutrients present in the soil

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