Question

Examples of macronutrients are:

• A. Boron, zinc, manganese.
• B. Iron, copper, molybdenum.
• C. Molybdenum, magnesium, manganese.
• D. Nitrogen, magnesium, phosphorus.

Answer 1

Answer: (D)

Macronutrients are required in the greater amount which is 1 mg-gram of plant dry weight.
The macronutrients include:
•Carbon (C)
•Hydrogen (H)
•Oxygen (O)
•Nitrogen (N)
•Phosphorus (P)
•Potassium (K)
•Calcium (Ca)
•Magnesium (Mg)
•Sulfur (S)
The first three-carbons, hydrogen and oxygen are known as 'structural elements' and are present in the atmosphere and growing environment.