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Last updated on April 20, 2014 at 14:04 EDT

Latest Steve Culman Stories

2013-02-11 14:45:34

Organic matter is important for soil health and crop productivity. While an indicator of soil quality, a lot of organic matter is in extremely stable forms, and the nutrients in such forms are difficult for plants to use. The active, labile fraction, however, is a modest but important part of the organic matter. "The labile fraction is small — usually less than 20 or even 10 percent, depending on how you define it," explains Steve Culman, lead author of a study published online Feb....