Question

Which of the following minerals are called as critical element for crops?

• A. N, P, K
• B. C, H, O
• C. N, S, Mg
• D. K, Ca, Fe

Answer 1

The correct option is A N, P, K

Plants require seventeen essential mineral elements. The essential mineral elements can be grouped into two classes based on the amount required. Macronutrients are the minerals required in large amount. The important macronutrients for plants are carbon, hydrogen, oxygen, nitrogen, phosphorous, sulphur, magnesium, potassium, calcium.

The micronutrients required in lesser amount are zinc, copper, iron, manganese, nickel, molybdenum, chlorine and boron.

The macronutrients required in largest amount are nitrogen, phosphorous and potassium. These minerals are frequently deficient in soil and are hence called as critical elements.