The tariff was announced May 3 as one of many measures to punish Russia for its unprovoked invasion of The Ukraine.
Fertilizer Canada said 85 to 90 per cent of the nitrogen for Eastern Canada is imported from Russia.
The CFFO and OABA want shipments that were underway before the tariff was announced to be allowed to dock in Canada and offload without application of the new tariff.
The CFFO said farmers deserve all the help they can get to produce as much as possible this year, partly in response to demand from those who normally depend on food from The Ukraine and Russia.