What are the causes of chlorosis in plants?

Nutrient deficiencyis what causes chlorosis in plants.

Specifically, the term chlorosis designates a condition whereby foliage appears lighter than normal, typically pale or yellow green. The cause is nutrient deficiency or interference with the plant synthesizing necessary amounts of chlorophyll. The interference may be due to:

• Minerals such as iron and magnesium being deficient or being present but unavailable because of improper soil pH;

• Nitrogen and protein deficiency;

• Roots being compacted, damaged or waterlogged;

• Toxicity from ozone weakness, pesticides and sulphur dioxide.