GENERAL KNOWLEDGE

Detailed explanation-1: -The Rhizobium or Bradyrhizobium bacteria colonize the host plant’s root system and cause the roots to form nodules to house the bacteria (Figure 4). The bacteria then begin to fix the nitrogen required by the plant.

Detailed explanation-2: -Bacteria in the soil fix the nitrogen. That means they combine it with oxygen or hydrogen into compounds that plants can make use of. Some nitrogen-fixing microbes have even developed a symbiotic relationship with certain plants–like peas and beans.