Question

In plant mineral nutrition, elements are called macro or micro-elements depending upon their.

• A. Relative presence in plant ash
• B. Relative importance in plant growth
• C. Relative amount required in plants
• D. Relative availability in soil

Answer 1

Answer: (C)

Relative amount required in plants

There are some nutrients which are required in large amounts, which are called macronutrients like nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur are macronutrients.

There are about seven nutrients essential to plant growth and health that are only needed in very small quantities/amount. In plants, micronutrients are: boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), and zinc (Zn).
Thus, macro or micro-elements depends on the relative amount required in plants.
Thus, the correct answer is option (C).