The products of the Complex line are liquid and powder fertilizers with a high content of micro and meso elements, complexed with alpha hydroxides (AHA). Unlike other chelating agents, AHA do not damage the structure of plant cell walls during absorption. The products of the Complex line are not affected by the chemical characteristics of the soil water and their stability is maximum at both acidic and alkaline pH. The Complex line is effective in the treatment and prevention of many physiopathies due to a deficiency of Meso (Mg, Ca) and Micro elements (Fe, Mn, Zn, B, etc).