ADP has become one of the leading companies in the production and marketing of high value-added plant nutrition products not only in Portugal, where it has always been the market leader, but also throughout Europe, Africa, the Middle and Far East and Australia. ADP is Zerya certified. This certification guarantees that these products, when applied, promote the development of agricultural production systems that favour the production of food with zero residues, i.e. free of pesticide residues, and guarantee a high level of production quality, increasing consumer confidence.