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This is to certify that your paper entitled «The effect of irrigation intervals and nitrogenous fertilizer on the quantitative and qualitative performance of chamomile» was indexed with 8 pages, in the CIVILICA citation database, code COI:ICDAN03_011, after evaluation and approval of the referees of the "سومین کنگره سراسری در مسیر توسعه علوم کشاورزی و منابع طبیعی held in Gorgan 2016.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.