" At one point last week, there was only 75,000 tonnes of inventory in North America at a time when there should have been 1 million tonnes, Brownlee said.
Potash producers are unable to supply 8 to 10 percent of world demand this year, or a total of 3 million to 4 million tonnes, mainly in China, Brownlee said.
"We think there's actually a chance that you're going to see potash be short for the next five years," he said.
Potash Corp plans to boost capacity by 80 percent in the next five to seven years to try to fill the gap, he said."
