Nitrogen is one of the most important nutrient elements used all over the
world with the aim of increasing and sustainability of the production of the
agricultural crops. During the 'Green Revolution', nitrogen fertilisers contributed to
the increase and maintenance of crop yields under different agroecosystems.
Nitrogen was a key of economic variability of the agricultural production worldwide,
and in this way, it was globally a key of food. On the other hand,
anthropogenic influences (fossil fuel combustion) contributed to a greater release
of gases, such as carbon dioxide and nitrogen oxides, resulting in global warming
of our planet. The application of organic and mineral nitrogen fertilisers can cause
losses of nitrogen in gaseous states, as well as, nitrite leaching. Therefore, nitrite
contamination of drinking water is already a serious problem in many parts of the
world. New technologies in the application of nitrogen fertilisers and crop growing,
such as: a precise technique of the plant production, quick tests (in situ) for
analysing concentrations of nitrite nitrogen in the plant tissues, rapid tests for
chlorophyll determination, the use of computer models of simulation for the
improvement of production planning and organising - can affect the increase of the
average efficiency in the nitrogen utilisation under different agroecosystems by
more than 50%. This paper presents the modes and possibilities of the rational
application of nitrogen fertilisers in the seed maize production, which is specific in
many of its parameters, as a necessary procedure to maintain a safe agroecosystem
