Vol. 6, Issue 7, Part E (2020)

Abstract
Nickel stands 24^th in most abundant elements list in earth crust, and present as 3% of earth composition. By weight it is 5^th most copious element after iron. In low concentration Ni is essential element, in natural form nickel occurring in soil and surface water and its concentration is less than 100 and 0.005 ppm. Plants need trace elements to perform their metabolic functions normally, when concentration of trace elements is more than required it will become hazardous and will interfere with plants physiological as well as biological processes ultimately hampered the crop production. The aim of this review was to evaluate the data about nickels functioning in metabolism of plant and its essentiality with its importance for agronomic crops and also contamination of soil with heavy metals.