They assist in the fixation of free nitrogen, and they build up assimilable compounds.
Another explanation attributes this fixation of free nitrogen to microorganisms existing in the rootlets of the plant.
Schloesing has recently shown that this fixation of free nitrogen by soils is extremely doubtful.
The assimilation of free nitrogen by the leguminosæ, so far as modern research has revealed, only takes place under the influence of micro-organic life.
A part is finally liberated as free nitrogen or as ammonia after having undergone a series of transformations many of which are still undetermined.
All of these nitrogen compounds are attacked by bacteria and the nitrogen is eventually liberated, so far as it is not locked up in the bodies of the bacteria, as free nitrogen or as ammonia.
As ptomaines result from the putrefaction of proteins, so they are still further decomposed by bacteria and eventually the nitrogen is liberated either as free nitrogen or as ammonia.
It is only within a short time that it has been demonstrated to exist, but we must look upon bacteria in the soil as one of the factors in reclaiming from the atmosphere the dissipated free nitrogen.
When they are exploded the nitrogen of the compound is dissipated into the air in the form of gas, much of it in the form of free nitrogen.
In the process of decomposition which is going on through the agency of micro-organisms, a considerable part of the nitrogen is dissipated into the air in the form of free nitrogen.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "free nitrogen" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
