Sulfur as corrective
One of the most important values, necessary to be evaluated in the soil, is the pH because it is affecting the entity and the activity of the micro organisms, the transformation of organic Nitrogen as nitrates, the velocity of absorption of the fertilizer elements. A function of sulfur as corrective is to lower the pH of the ground with the result of easing the activity of micro organisms, the nitrification of nitrogen, the fixing of nitrogen into the ground, the process of chlorophyll photosynthesis and the absorption of the other fertilizers. It fights the chlorosis because releasing the microelements blocked in the ground.
In the salty grounds it facilitates the washout of the salts because it reacts transforming them in sulfates easily washable out. In the clay grounds it breaks the clumps easing the permeability of the water. The consequence of that is the great saving in the cost of fertilization due the minor quantity of fertilizers to be used. Through tests developed in experimental fields it has been noted that it can reduce 50% of the supply of Phosphorous (P), the 20% of Potassium (K) and eliminate microelements. The condition of acidity in the ground, below the normal one, permits to the plants the availability of fertilizers constantly and in the exact moment needed.
The result consists in anticipation of the maturation of some days and an increase of the performance in terms of quantity and quality. It is suggested during all the periods of the year given that sulfur is acting into the ground creating the best conditions for all the vegetative phases
Sulfur as fungicide
The use of sulfur as fungicide, dates back to ancient times. The mechanism of action of sulfur is very simple. It acts in contact with the parasite inhibiting the breathing chain of fungal spores. The sulfur then avoid the proliferation of the spores blocking the parasites. Prior treatments with sulfur represent the best antidote against the uprising of fungal diseases as Oidium, Excoriose, Rust. It is also a valid fungicide because acts against mites such as the pear leaf and grape leaf blister mites.
Sulfur as nourishing
The fertilizers give nourishing to crops; according to the necessary quantity for the development of the crops the fertilizers are divided in: Main fertilizers (Nitrogen, Phosphorous, Potassium), Secondary Fertilizers (Calcium, Magnesium, Sulfur) Microelements (Iron, Manganese, Boron, ). Many cultivations absorb huge quantities of sulfur, often at the same level of Nitrogen and in some case in major measure (tobacco, cabbage, potatoes, garlic, rapeseed). The vegetables are not able to absorb Nitrogen in organic form but as nitrates. For sulfur a process of transformation to sulfate is necessary. In shortage of sulfur the metabolism of Nitrogen is obstructed and this fact determines the necessity to use more quantities of Nitrogen, a slowdown of the photosynthesis process and grow up of plants and the arise of chlorosis too.
Lack of sulfur into the soils, often under evaluated, is due mainly to the spread in the past of fertilizers with high title of nitrogen but without sulfur, to the desulphurization of the emissions into the atmosphere and to the increase of the yield per hectare with consequent major removal of sulfur from the ground. It is necessary then to restore the correct ratio among all the nourishing elements through the supply of sulfur to the ground so to permit the increase of efficacy of the main fertilizers, the yield per hectare and the quality of the crops. It is a nourishing element which is necessary at the same extend than Phosphorus and Potassium, basic for the physiology of the plant and for the chlorophyll photosynthesis. Sulfur is necessary for the formation of two essential amino acids such as Cystine and Methionine which are needed to the synthesis of proteins by which is depending the nutritional value of the agricultural products and it is indispensable for the formation of two sulfides compounds such as Thiamine and Biotin essential elements respectively for Vitamins B1 and H and for Vitamin A.