Which of the following is deficient in the soil of Gujarat,$U$.$P$.,and Maharashtra in a large area?

If a plant shows a symptom which could develop due to deficiency of more than one nutrient,how would you find out experimentally,the real deficient mineral element?

The deficiency of this micronutrient results in little leaf disease.

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:

Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiencies would show such symptoms?

Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.