Petro is the historic line of Agriges base fertilizers made from valuable raw materials of organic and mineral origin, expertly processed and mixed to obtain a complete product, capable of: nourishing the plant in a balanced and constant manner over time, phytostimulating the plant metabolism and improve the chemical, physical and biological characteristics of the soil. Petro 330 ST Bio ThB is a biologically active product thanks to the exclusive RyZea and Microbial production technologies, which enrich it with phytostimulant molecules and exclusive siderophore bacteria respectively. The result of the synergy of its different components is a product that improves root development and absorption, acidifying and desalination of the circulating solution.