The barriers to the wider adoption of increasing soil microbes for improving crop yields are: Applied microbes are often out-competed by other soil microbes, The bacteria cause disease in plants, Accessing appropriate soil microbes can be expensive, Current policies limit access to soil microbes to those who meet specified yield quotas.
All the options are applicable.
How do we explain?The applied microbes are often out-competed by other soil microbes: When introducing additional microbes into the soil, they may face competition from the existing microbial community.
Also, the bacteria cause disease in plants. While soil microbes can be beneficial for plant growth, there is a risk that certain bacteria or pathogens introduced into the soil may cause plant diseases. It is important to carefully select and screen the microbes to avoid introducing harmful pathogens that can negatively impact plant health.
Learn more about bacteria at:
https://brainly.com/question/8695285
#SPJ1