Chlorosis is caused due to the deficiency of:

What is the deficiency effect of Molybdenum?

In a $Citrus$ plantation,all the plants were found to be suffering from the die-back disease,and spraying of fungicides was of no help. This problem was due to the deficiency of:

Assertion : Deficiency of sulphur causes chlorosis in plants.
Reason : Sulphur is a constituent of chlorophyll,protein and nucleic acids.

The die-back disease in Citrus is due to deficiency of . . . . . . .

Gray speck disease in oats takes place by the deficiency of