Više od 20 europskih udruženja poljoprivrednika zatražilo je da budu zainteresirane strane.
Fertilizer Outlook 2017–2021 från International Fertilizer Association, https://www.fertilizer.org/images/Library_Downloads/2017_IFA_Annual_Conference_Marrakech_PIT_AG_Fertilizer_Outlook.pdf, eller Yara Fertilizer Industry Handbook January 2017, https://www.yara.com/siteassets/investors/057-reports-and-presentations/other/2017/fertilizer-industry-handbook_2017_slides_only.pdf/.