Ni

 Nickel

                (Taken by plant as Ni2+)

         Nickel content in plant 0.1 - 1.0 ppm dry matter basis.

         Taken by plant as Ni2+

         High levels of Ni may induce Zn or Fe deficiency

Functions of Nickel

1. Ni - metal component of urease that catalyse reaction.

   CO (NH2)2 + H2O à 2NH3 + CO2.

2. Essential for N metabolism.

3. Stimulates nodule weight and yield of crops.