Why is nitrogen so important to plants

is because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (photosynthesis). It is also a major component of amino acids (protein), is the building blocks of proteins.

Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i. e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins.