Question

Define 1 nitrogen cycle 2 nitrogen fixation in about 50 words

Answer 1

(1) nitrogen cycle :- the cyclic process of nitrogen being fixed, used by plants and animals,and later returned to the atmosphere is referred to as the nitrogen cycle.
(2) nitrogen fixation:- the process of converting free nitrogen gas of the atmosphere into nitrogen compounds is called nitrogen fixation. In nature it takes place through 2 ways.
• atmospheric nitrogen fixation
• biological nitrogen fixation.