Focusing on biological nitrogen fixation (BNF) by symbiotic bacteria like Rhizobium and free-living organisms like Azotobacter .
: This metric compares the microbial population in the root zone (R) to the population in non-rhizosphere soil (S). A high R:S ratio indicates a highly active plant-microbe symbiosis.
Focusing on biological nitrogen fixation (BNF) by symbiotic bacteria like Rhizobium and free-living organisms like Azotobacter .
: This metric compares the microbial population in the root zone (R) to the population in non-rhizosphere soil (S). A high R:S ratio indicates a highly active plant-microbe symbiosis. soil microbiology subba rao pdf free download extra quality