Elements which are required by the plants in minute quantities are called ........

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term used to describe elements that plants need in very small amounts.

2. **Identifying the Category**: In plant nutrition, elements can be categorized based on the quantity required by the plants. These categories are macronutrients (needed in larger amounts) and micronutrients (needed in smaller amounts).

3. **Defining Micronutrients**: Micronutrients are essential elements that plants require in minute quantities. They play crucial roles in various physiological functions within the plant.

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