Soil Organic Matter (SOM)
If manure is applied at rates equal to or less than the nitrogen (N) requirement of a crop, can manure produce environmental benefits over commercial fertilizer? This article summarizes the "Take Home Messages" from a paper summarizing 141 studies relative to the question.
Soil organic matter is critical to maximizing soil biological activity. Rotating crops, applying manure, reducing tillage, and increasing biomass production are among recommended practices to increase soil organic matter.