Solution:
Iodine does not follow the criteria of essentiality of elements in plant nutrition. Hence it is non-essential element. Chlorine, Copper and Nickel are essential micronutrients.
Choose the element that does not follow the criteria for essentiality of an element in plant nutrition.
Iodine does not follow the criteria of essentiality of elements in plant nutrition. Hence it is non-essential element. Chlorine, Copper and Nickel are essential micronutrients.