Question

Give five reasons why nitrogen is the most limiting nutrients for plant growth

Answer 1

Nitrogen and phosphorus are among the elements considered most limiting to plant growth and productivity because they are often present in small quantities locally or are present in a form that cannot be used by the plant.

Nitrogen (N) in a way could be termed "a backbone" of plants going by what it does in plants. Of all the essential nutrients, Nitrogen is required by plants in large amounts since it plays important functions and can be the limiting factor in plant production and proper crop development. Here is a look at Nitrogen's functions in plants:

Nitrogen is an essential element of all the amino acids in plant structures which are the building blocks of plant proteins, important in the growth and development of vital plant tissues and cells like the cell membranes and chlorophyll.

Nitrogen is a component of nucleic acid that forms DNA a genetic material significant in the transfer of certain crop traits and characteristics that aid in plant survival. It also helps hold the genetic code in the plant nucleus.

Chlorophyll being an organelle essential for carbohydrate formation by photosynthesis and a substance that gives the plant their green color, nitrogen is a component in it that aids in enhancing these features.

Nitrogen is essential in plant processes such as photosynthesis. Thus, plants with sufficient nitrogen will experience high rates of photosynthesis and typically exhibit vigorous plant growth and development.

Answer 2

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Nitrogen as a limiting nutrient. In natural ecosystems, many processes, such as primary production and decomposition, are limited by the available supply of nitrogen. ... When a nutrient is limiting, adding more of it will increase growth—e.g., it will cause plants to grow taller than if nothing were added.