Pasture Health, Soil Soil chemistry? Are you kidding? CEC in Under 500 Words Rachel Gilker August 12, 2013 Remember our article on pH and why you should care? Well this is a follow on article that gives you an atomic look at how your soil's chemistry affects fertility. Cation Exchange Capacity: CEC isAll the grazing management tips you need Subscribe to read this article and over 2,500 more! Subscribe today! If you're already a subscriber, log in here.