Question

Secondary nutrients in the fertilizers are

a) Nitrogen, Phosphorous, Potassium

b) iron, sulfur, molybdenum

c)Calcium, magnesium,zinc

d) Calcium, magnesium, sulfur

Answer 1

d) Calcium, magnesium, sulfur

They are called “secondary” nutrients because plants require them in smaller quantities than nitrogen, phosphorus, and potassium. On the other hand, plants require these nutrients in larger quantities than the “micronutrients” such as boron and molybdenum.