Who gave the criteria of essentiality

What are the criteria of essentiality of an element?

Criteria For Essentiality

What are essential elements for plants ? Give the criteria of essentiality?

What is the criteria of essentiality of elements?

What are essential elements for plants ? Give the criteria of essentiality? How are minerals classified depending upon the amount in which they are needed by the plants?

What are essential elements for plants ? Give the criteria of essentiality ? How are minerals classifieds depending upon the amount in which they are needed by the plants ?

What are essential elements for plants ? Give the criteria of essentiality ? How are minerals classifieds depending upon the amount in which they are needed by the plants ?

What are essential elements for plants? Give the criteria of essentiality?How are minerals classified depending upon the amount in which they are needed by the plants?

What are essential elements for plants? Give the criteria of essentiality. How are minerals classified depending upon the amount in which they are needed by the plants?