It's good to see that the rest of the world is catching on to the benefits of sulfur! I had dealer tell me that in 1996 a trade publication (no longer in print) had a cover story titled "Sulfur Arrives as the 4th Major Nutrient". Well they were only off 15 years, but finally sulfur is getting the respect of researchers, farmers and is getting some press.
Check out these two great article from Corn and Soybean Digest
http://cornandsoybeandigest.com/does-sulfur-pay
http://cornandsoybeandigest.com/crop-chemicals/will-you-need-sulfur-your-next-corn-crop
SuperCal SO4 is the gypsum referred to in the first article and the trial data can be found here.
We've been showing a need sulfur for it in Iowa since 2004 and on Alfalfa since 1998! Glad everyone else is figuring it out too!
More on Sulfur
http://www.calciumproducts.com/sulfur-fertilization.cfm
http://blog.calciumproducts.com/posts/supercal-helps-pay-the-bills-in-canada.cfm
http://blog.calciumproducts.com/posts/isa-on-farm-trial-update.cfm
http://blog.calciumproducts.com/posts/corn-showing-signs-of-sulfur-deficiency.cfm
http://blog.calciumproducts.com/posts/sulfurs-effect-on-plant-diseases.cfm
http://blog.calciumproducts.com/posts/2009-iowa-state-sulfur-trials.cfm
http://blog.calciumproducts.com/posts/sulfur-elemental-vs-sulfate.cfm
http://blog.calciumproducts.com/posts/sulfur-deficiency-.cfm
Yield Starts Here is a blog for farmers, focusing on increasing yield and profitability by focusing on the soil. It is managed by Craig Dick, a Blogronomist and Sales and Marketing Manager at Calcium Products. Find other articles by Craig and guest writers at http://blog.calciumproducts.com/ .