President Trump’s plan to impose a 100 percent tariff on Russian goods could raise the cost of urea, a key fertilizer in corn and other row crops.

President Donald Trump may have expected a Russian shudder of fear to greet his threat of “very severe tariffs” on the country if it didn’t agree a ceasefire in Ukraine.

Trump said the United States would put secondary tariffs on countries that do business with Russia if a peace deal is not reached in 50 days.