Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Intrepid Potash (NYSE: IPI) is trading 10% higher today, after a government report revealed weak American corn crops this year.

So What: Intrepid is hardly the only fertilizer expert getting a boost from this report; fellow potash miner Mosaic (NYSE: MOS) rose 7%, and nitrogen specialist Terra Nitrogen (NYSE: TNH) saw a 3.5% jump overnight. A disappointing harvest is obviously good news for the entire fertilizer industry.

Now What: This sudden pop is great for current Intrepid shareholders, but you might do better elsewhere if you're new to the fertilizer industry. Intrepid is far from a best-of-breed competitor, because of shrinking sales, an already expensive stock by nearly every metric, and a lack of dividends. Many competitors sport very strong yields, and Terra Nitrogen and Mosaic in particular both look like stronger choices in the fertilizer field today.

Interested in more info on Intrepid Potash? Add it to your watchlist.

Fool contributor Anders Bylund holds no position in any of the companies discussed here, though he once shorted Terra Nitrogen to great effect. True to its name, The Motley Fool is made up of a motley assortment of writers and analysts, each with a unique perspective; sometimes we agree, sometimes we disagree, but we all believe in the power of learning from each other through our Foolish community. The Motley Fool is investors writing for investors.