In the Spring 2010 issue of Liquid Does it Better, from Agro-Culture Liquid Fertilizers, Cory Schurman the Agronomy Director for Agro-Culutre wrote a very nice article on balancing your soils for better yeilds.
Why would a liquid company talk about lime, sulfur, gyspum, and calcium? The answer is simple, guys like Cory are working for the farmer to help them raise a better crop. If reccommeding a product he doesn't sell increases yield, than you can bet he is going to let his customers know about it.
You can read Cory's article here and download past articles at http://www.agroliquid.com/newsletters/
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/ .