Complex sentence: A 2015 study found that farming can deplete soil carbon and render soil incapable of supporting life; however, the study also showed that conservation farming can protect carbon in soils, and repair damage over time.
Split into simpler sentences: A 2015 study found that farming can deplete soil carbon and render soil incapable of supporting life. Instead the study showed that conservation farming can protect carbon in soils, and repair damage over time.