Sulfur is present in the soil as organic and mineral.

Organic sulfur is the most important reserves of ground mineralization and progress to a more or less quickly depending on the activity of microorganisms.

Phosphorus is found in soil as organic and inorganic compounds. Soil organic phosphorus comes from the decomposition of organic residues from crop residues or organic fertilizers.

One of the major mineral elements of plant nutrition.

Nitrogen is found in soil so as combinations of organic and inorganic. Total nitrogen content can reach up to 0.5% of total dry substance of the soil, but more often this content oscillates around 0.1%.