[blingscramble]

Entrenched interests would be a driver as well as conventional wisdom here to date imo. That said there are indeed millions of acres in the mid-west (US) and beyond operated by commercial growers whom leverage the benefits of inoculating their acres with beneficial microbes. Ultimately mother nature dictates yield mainly thru moisture availability (acres under a pivot excluded) so growers focus on risk mitigation and nutrient efficiencies to achieve profitability. The paradigm is shifting away from heavy synthetics due to costs, generational transitions in operation management and our understanding of the rhizosphere. Beneficial microbes are not the only answer but leveraging their inherent capabilities is an effective tool and currently available.