Which nutrient is most commonly associated with root growth in plants?

Phosphorous is the nutrient most commonly associated with root growth in plants due to its essential role in several physiological processes. It is a key component of adenosine triphosphate (ATP), which provides the energy necessary for various cellular activities, including those involved in root development. Furthermore, phosphorous is critical for the formation of nucleic acids and is involved in the energy transfer processes within the plant.

The availability of phosphorous in the soil typically has a direct correlation with root biomass accumulation. Adequate levels promote vigorous root systems, which are crucial for the overall growth and stability of the plant, as they enhance the plant's ability to absorb water and other nutrients. Additionally, phosphorous supports the establishment of root systems, especially in young seedlings, allowing for improved nutrient uptake and increase in plant productivity.