The nature balances the elements the plants need to produce amino acids. Carbon and oxygen are abundant in the atmosphere, and hydrogen is available as long as water is present. Nitrogen is recycled mainly through compost and manure with the help of bacteria. Atmospheric nitrogen can also be utilized with the help of bacteria.
Nitrogen appears in two different forms:
Inorganic nitrogen must be converted to ammonia before it can be used by the plants. This conversion is done by bacteria in the soil. Ammonia is then converted into organic nitrogen by other bacteria and assimilated into glutamine, glutamate, asparagine and aspartate, which serve as important nitrogen carriers in plants. This process is done with the help of enzymes (GS, GOGAT, AspAT and AS).
Modern agriculture focuses on efficiency. But the natural nitrogen balance in the soil is disrupted, because the plants are removed from the site (no decomposition) and animals are prevented from entering the area (no manure). To compensate for this are nitrogen and other elements added to the soil in the form of chemical fertilizers.
While fertilizers improve plant growth, do they also create problems. Soil health relies on a balance of macronutrients and micronutrients, as well as microbial health. It is much more complicated then simply adding nitrogen, phosphorus and potassium (NPK) to the soil.
Here are some the negative effects of chemical fertilizers: