Dear Dr. Phogat Sir,

Please check the following links and pdf attachments for the answer.

http://6e.plantphys.net/topic05.01.html

http://www.agritech.tnau.ac.in/agriculture/agri_min_nutri_def_symptoms.html

Regards,

Dr. Arvind Singh

Yes , it does happen  often , if not  frequently, especially Fe versus Mn or N versus S. And , in perennial crops , it is more common .

In natural systems, yes, more than one nutrient can be deficient, certainly, depending on the soil chemical characteristics and the plant feedback. For example in boreal systems, often both nitrogen, and bases can be limiting. However, only one nutrient is MOST limiting, and if this nutrient is applied then other deficiencies will come to the top.

Very often , sectorial nutrient deficiency  on   a  plant involving deficiency of more than one  nutrients is commonly observed. Alison is right , one nutrient will be dominant and other will recessive type , but symptoms will be very clear.

Does it mean symptoms will appear one by one, not two at a time if both are deficient

Howard Sprague's "Hunger Signs in Crops" in three editions is still the best reference with color photos for many different crops and all of the micro-nutrients.  Out of print but available on Amazon.   Howard's book worth their weight in gold.