EC correlates with soil properties such as soil texture, cation exchange capacity, drainage conditions, organic matter level, salinity, etc. Therefore, EC affects growth, development, and biochemical activity of PSMs. It is like when you cultivate PSM in a bioreactor: if you change some of the conditions, the microorganism reacts changing its morphology, physiology, and biochemical properties (for example organic acids production and, as a result, P-solubilization).