Modern Cannabis genetics are perpetually carbon deficient (hollow stems) due to breeding for energy intense hydrocarbons coupled with poor growing practice. You see organic guys feeding barley grain in flower which has much more nitrogen than carbon, for example.
Living soil will pull all sorts of carbon from the soil that doesn't get metabolized into weed flavors. With liquids, you can chelate calcium etc with fumaric acid and get fruit flavor into the plant instead of compost flavor.
Soil growers will also burst microbes and release excess ions into the plant. AKA hydroponics. I've done experiments feeding nutrient-specific decompositions to mutant plants with no aroma metabolism and low brix/acid levels. Composted limestone stands out. It made the substrate smell like 'ions'. If you know you know. Some, but not all of the plants had that metallic minerally, cold crisp open window morning air, ion generator, static electricity smell in the resin. It was like smoking the content of an excavator bucket. In theory organic cannabis should be of such high quality that these "terroirs" should never go noticed, but they are their. Organic acid-chelated liquid ferts are cleaner.
If anyone wants to see for themselves, top dress an insane amount of bone meal to some dank mid flower. It changes the smell, for the worst, as the plant takes up carbon from the bone. If a plant will eat its own innards seeking carbon during bloom, it will eat whatever carbon it can grab from the soil.
