Which is not an essential macro-element for growth of plants _____________.
Which is not an essential macro-element for growth of plants _____________.
The correct option is A Na
Essential elements: These elements are necessary for plant growth and reproduction. The requirement of these elements is specific and non-replaceable. They are further classified as macro and micro-nutrients.
Macronutrients: They are the nutrients required by plants in large amounts. They are present in plant tissues in amounts of more than 10 mmole kg–1 of dry matter. Examples include hydrogen, oxygen, and nitrogen.
Micronutrients: They are also called trace elements and are present in plant bodies in very small amounts, i.e., amounts less than 10 mmole kg– 1 of dry matter. Examples include cobalt, manganese, zinc, etc.
The chart of Macro and Micronutrient is shown here, from this it is clear that except Na(which is a beneficiary element) other either fall to Micro(Zn)or Macro(Ca, K) category.
So, the correct answer is 'Na'
Essential elements: These elements are necessary for plant growth and reproduction. The requirement of these elements is specific and non-replaceable. They are further classified as macro and micro-nutrients.
Macronutrients: They are the nutrients required by plants in large amounts. They are present in plant tissues in amounts of more than 10 mmole kg–1 of dry matter. Examples include hydrogen, oxygen, and nitrogen.
Micronutrients: They are also called trace elements and are present in plant bodies in very small amounts, i.e., amounts less than 10 mmole kg– 1 of dry matter. Examples include cobalt, manganese, zinc, etc.
The chart of Macro and Micronutrient is shown here, from this it is clear that except Na(which is a beneficiary element) other either fall to Micro(Zn)or Macro(Ca, K) category.
So, the correct answer is 'Na'
