 (Maximum Residue Level) The potential residues on a harvested crop are regulated by a maximum level. From the respective residue study data a proposal for a maximum residue limit (MRL) can be calculated using official calculation tools. If the use is deemed to be safe, the calculated MRL is taken up into an official register and is then a legal limit. When a product is used as recommended (according to the Good Agricultural Practice GAP) the resulting residues will then be below the MRL. VIEW FULL GLOSSARY 