Several years ago, there was a lot of interest in potash deposits in north central North Dakota.
Potash is a popular agricultural fertilizer.
At the time, the interest was driven by price.
"For about 25 years or so, it had been about $100 a ton," said state geologist Ed Murphy. "Then it jumped up to about $1000."
Murphy says that happened in 2007. But he says the 2008 recession caused the price to drop – where it’s now about $300 per ton. Murphy says it appears the interest isn’t as high now. But he says that could change.