 Nicole Tauches is with the Michael Fields Agricultural Institute in Wisconsin. She says some strategies for increasing soil carbon are more effective than others, so it's critical to monitor the real-world changes and to do so accurately. Her research shows that measuring just the top layer of soil may provide a misleading picture of soil carbon. So that is to say, if you're just looking in the top foot and you observe an increase, well, there could be losses going on in deeper parts of the soil.