I would like to add few points - about Beneficial & Pathogenic forms of soil micro organisms.
-For sound health of soil more beneficial ( eg . 70%)& less pathogenic (eg. 30%) is
must for better growth of plants.
by producing different types of enzymes, polysaccharides, Amino acids ,hormones,
vitamins, antibiotics etc… which are beneficial for growth crop plants.
Try to keep the population of beneficial microbes enmass by biofermentation.