Q. Micronutrients are needed in amounts :
(a) 8m mole/kg dry matter
(b) 18m mole/kg dry matter
(c) 25m mole/kg dry matter
(d) 30m mole/kg dry matter
Solution :
Correct option : A Micronutrients are those essential elements which are required by plants in small amounts, less than 10 m mole/kg of dry matter. They are mostly involved in the functioning of enzymes. Since, micronutrients are required in traces, they are also called trace elements. Micronutrients are eight in number – iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel.