Many of the same factors that impact a crop’s growth also impact microbial activity. Soil type is one example that can influence microbial activity. Things like the pH levels, moisture levels and oxygenation of your soil are direct influences for crop growth and microbial activity.

Researchers have developed a way to assess soil health by measuring the electric current produced by its tiniest microbes, a proof-of-concept study that could someday lead to a simple, real-time test for farmers to determine whether soil is productive, says Washington State University.