Found some more interesting stuff about organic matter.
 " Very few people, scientists included, think of carbon as an essential plant nutrient to be managed as such. Dwayne Beck reminds us of this, noting that most greenhouses fortify their air with CO2 to enhance plant growth. Managing the cycling of carbon in the context of no-till field crops is a new concept—basically sequencing the crops or timing the N applications to match CO2 emissions from decaying residues with crop canopy conditions. Cycling nutrients is nothing new, but everyone forgot about the most important nutrient, carbon. Beck remarks playfully: “That’s why we have Dwayne Beck around—to talk about the obvious stuff.” 

Soil-Organic-Matter-N-Cycling.pdf (greencountylwcd.com)