The quality and health of agricultural products can be achieved as a consequence of the quality of soil, water, inputs and appropriate agricultural operations and proper and scientific management. Therefore, the production of certified crops is considered as an important step in this regard.
   "Instruction for issuance, renew, suspension, removal of suspension and revocation the certificate of license for the use of permissible limits mark of contaminants in agricultural products" was revised in 2018 as a guide to obtain an incentive standard and a solution for the production of certified crops.
   The instruction facilitates and accelerates the process of receiving the permissible limits mark by using modern systems, simplifying processes and using the services of specialized companies. For more information please refer to the information base of certified and organic crops at cerganic.maj.ir.
   In order to implement the permissible limits of contaminants, it is necessary to have technical instructions for producing certified crops in accordance with its standard. In this regard, a memorandum of cooperation was signed between the Agricultural Research, Education and Extension Organization and the Office of Environment and Food Health, according to which the preparation, compilation and instruction of certified crops were entrusted to the Agricultural Research, Education and Extension Organization to be reviewed and finalized in the form of a joint executive committee.
     The instructions with the participation of research institutes affiliated to the Agricultural Research, Education and Extension Organization, especially Soil and Water Research Institute, Iranian Research Institute of Plant Protection, Seed and Plant Improvement Institute, Horticultural Sciences Research Institute, Agricultural Engineering Research Institute and at the request of the Office of Environment and Food Health are being prepared and compiled, which includes 16 products: Beans, Lettuce, Potato, Onion, Watermelon, Melon, Orange, Tangerine, Date, Wheat, Corn, Canola, Grapes, Spinach, Pistachio.