Interesting article, well worth the read.
People wonder why I'm more concerned about our soils then fossil fuels, from the article.
| Based on the global agricultural land area, cultivation has likely released between 50 and 70 Gt of C to the atmosphere over the course of human history, and the combined cultivation and biomass burning contributions to atmospheric CO2 exceeded that of fossil fuel emissions well into the 20th century. However, the agricultural imprint on atmospheric greenhouse gas concentrations appeared much earlier in the Holocene.
| The next big war might be over phosphorus | Grist
| Under changed management or through land abandonment, global agricultural soils have the capacity to reapproach their original C storage and regain up to a half a decade of present fossil fuel emissions (over a multidecade period). Better stewardship of domesticated soils that leads to higher organic matter contents is a valuable practice from an ecological perspective and from an agronomic point of view. There is now a large body of research on the rates of C sequestration under differing management practices.