Q. No. 1:
What are macro-nutrients and why
are they called macro-nutrients?
Ans:
Macro-nutrients are those nutrients
which are required in large quantities for growth and development of plants. 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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