Nitrogen fixation is the process by which nitrogen is taken from its relatively inert molecular form -LRB- NUMBER@1 -RRB- in the atmosphere and converted into nitrogen compounds -LRB- such as ammonia , nitrate and nitrogen dioxide -RRB- .

Nitrogen fixation is the process by which nitrogen is taken from its stable gas form -LRB- NUMBER@1 -RRB- in air and changed into other nitrogen compounds -LRB- such as ammonia , nitrate and nitrogen dioxide -RRB- useful for other chemical processes .
