Hi aspirant.

The deficiency of the element bad effects on the growth of the plant. The deficiency of the elements Mg and K results in the necrosis and chlorosis. Necrosis is the death of the living tissue and chlorosis is the decolourisation of the pigment of the leaves.

Hope this is helpful

Hi there

Chlorosis is a disease which is caused by the loss of the normal green coloration of leaves of plants,  caused  by the  deficiency  of N, K, Mg, S, Fe, Mn, Zn and Mo.

While Necrosis is the death of a plant cell or tissue while the rest of the plants is still alive, and the dead tissue becomes dark in colour and it is  caused  by the  deficiency  of Ca, Mg, Cu and K.

Thus, the deficiency of the elements which causes both the necrosis and chlorosis are listed below:-

• Mg i.e Magnesium
• K i.e potassium

I hope that this helps you

Thankyou