Which nutrient deficiency can lead to stunted growth and yellowing of leaves?

The nutrient deficiency associated with stunted growth and yellowing of leaves is nitrogen. Nitrogen is a crucial component of amino acids, proteins, and nucleic acids, which are vital for plant growth and development. When a plant is deficient in nitrogen, it struggles to produce chlorophyll, the molecule responsible for the green color in leaves and essential for photosynthesis. As a result, leaves may exhibit yellowing, known as chlorosis, particularly in older leaves where the plant reallocates limited nitrogen to newer growth. Additionally, nitrogen deficiency leads to reduced overall growth, as it is integral to essential growth processes.

Phosphorus deficiency typically results in dark green leaves with purplish hues and stunted root development but is less directly linked to the yellowing of leaves. Potassium is important for overall plant health and stress tolerance but more commonly leads to scorching or necrotic spots on leaf edges. Zinc deficiency can cause similar symptoms like stunted growth but is more often associated with leaf distortion and the formation of dark spots rather than general chlorosis. Therefore, the key symptoms of stunted growth and yellowing of leaves clearly indicate a nitrogen deficiency.