Question

Which of the following macronutrients is used in fertilizers?

• A. N
• B. O
• C. P
• D. K

Answer 1

Answer:

D. K

• Nitrogen, Potassium and Phosphorus are important constituent of fertilizers.

• They are required in abundance by the plants.

• Oxygen is not used in artificial fertilizers.

• They in fact interfere with the process of nitrogen fixation carried out by cyanobacteria.