Deficiency symptoms appear first in young leaves and young tissues in case of elements which are relatively immobile inside the plant e.g., Ca, S. For mobile elements like N and K, deficiency symptoms first appear in old and senescent leaves ns the elements are mobilised from senescing regions for supply to young tissues.
The naturally occurring inorganic nutrient found in the soil and food that is necessary for the proper functioning of animal and plant bodies is defined as nutrition. Minerals are vital elements essential for the body.