A common cause of chlorosis is a deficiency of iron or manganese, both of which are present but unavailable in high pH soils (pH>7.2). Iron and manganese are needed by plants to form chlorophyll and to complete photosynthesis. ... Excesses of potassium, magnesium, and phosphorous also contribute to chlorosis.

Why does chlorosis occur in plants?

Chlorosis is a yellowing of leaf tissue due to a lack of chlorophyll. Possible causes of chlorosis include poor drainage, damaged roots, compacted roots, high alkalinity, and nutrient deficiencies in the plant. ... Manganese or zinc deficiencies in the plant will also cause chlorosis.

Why chlorosis occurs when there is an iron and nitrogen deficiency?

Chlorosis is a condition in plants where the leaves have yellowish colouration due to insufficient amount of chlorophyll in their cells.