NCERT Solutions for Class 9 Science Chapter 15
Important NCERT Questions
Improvements in Food Resources
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-206
Questions No-1
What are macro-nutrients and why are they called macronutrients?
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Macro-nutrients are essential nutrients required by plants, animals, and humans in relatively large quantities to support various physiological functions. In the context of agriculture, plants need three primary macronutrients: nitrogen (N), phosphorus (P), and potassium (K). These elements play crucial roles in plant growth, development, and overall health.
The term “macronutrients” stems from the large amounts in which these elements are needed by plants. It distinguishes them from micronutrients, which are required in smaller quantities. The ample presence of macronutrients in plants highlights their significance for sustaining life processes and forming a substantial part of the plant’s composition.
The macronutrients are nitrogen, phosphorus, potassium, calcium, magnesium and sulphur. They are called macronutrients because they are required by crop plants in large amounts.
Macro-nutrients are the essential elements which are utilised by plants in large quantities. Many macro-nutrients are required by the plants for the following functions:
Macro-nutrients are nutrients required in relatively large quantities for growth and development of plants. They are six in number. Since they are required in large quantities, they are known as macro-nutrient. The six macro-nutrients required by plants are nitrogen, phosphorus, potassium, calcium, magnesium, and sulphur.
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