This radioactive form of nitrogen does not occur in nature.
Under certain conditions, nitrogen present in coal is also released in the form of nitrogen oxides.
The new form of nitrogen stores large quantities of energy, leading to speculation that it could be used as rocket fuel or explosives.
Like other natural fertilizers, it contains nitrogen that is locked up at first but converted to ammonium by one set of soil micro-organisms and then by another to nitrate, another form of nitrogen used by plants.
Like the beans I planted, it can take nitrogen from the air and, with the help of nitrogen-fixing bacteria that colonize its roots, turn that gas into a form of nitrogen usable to the plant.
An active form of nitrogen, presumably containing free nitrogen atoms, can be created by passage of nitrogen gas at low pressure through a high-tension electrical discharge.
This very mobile form of nitrogen is that most commonly absorbed by plant roots, as well as by microorganisms in soil.
Nitrates were the most abundant form of nitrogen compound.
But the barium-based reaction only works for one form of nitrogen oxide.
The yield of ammonia is affected by the form of nitrogen in a medium.
Nitrate nitrogen is the main form of nitrogen uptake by the roots of chrysanthemum.
