Fertilizers represents for plants what food is for men and animals: in order to be able to live and grow, in facts, plants absorb nutritive elements (mineral salts) contained in the ground. As time goes by, however, the ground tends to get poorer and the growth of the plants becomes more and more difficult, with sparser and poorer harvests. So, in order to conserve a long lasting fertility of the ground, it is necessary to reintegrate, through the use of fertilizers, some nutritive elements taken from the crops.


Nitrogen, phosphorous and potassium, also called the main nutritive elements, have a key role in the vegetal nutrition. Other essential elements, called secondary, are calcium, magnesium, sulphur. A good contribution to crops nutrition and wellbeing is given also by microelements such as zinc, copper, iron, manganese, etc.


There are synthetic fertilizers, obtained by reproducing, through controlled chemical processes, natural phenomena, such compounds have the same characteristics of the naturally existing ones, such as ammonia and urea. As well, there are fertilizers of mineral origin, such as potassium or phosphorous salts chemically treated to greater or lesser extent, in order to effect on their solubility, and finally there are organic manures, in which the proteinic material and/or the material containing only organic carbon is stabilized through biological (organic) and/or chemical physical processes. It is possible then, through a controlled process, to incorporate the organic substance in the mineral fraction, obtaining the so called organic-mineral manures.


However plants are able to absorb nutritive elements only as minerals and for this reason also organic and organic-mineral manures in the ground undergo a process of mineralization by the microorganisms that live there.


Organic and organic-mineral fertilizers, thanks to the specific contribution they give to the soil, help maintaining and improving the fertility of the ground, one of the farmer’s key assets. Italian quality pasta, wines, and cheese, could not reach to consumers at affordable prices without the use of fertilizers. Also the organic agriculture sector could not subsist without the use of fertilizers, although, for this kind of production only the organic origin fertilizers are allowed.