Final answer:
Legumes revitalize depleted soil health by fixing atmospheric nitrogen through a mutualistic symbiotic relationship with bacteria found in their root nodules. The legume plants release nitrogen into the soil, making it available to other plants.
Step-by-step explanation:
Legumes revitalize depleted soil health by fixing atmospheric nitrogen through a mutualistic symbiotic relationship with bacteria found in their root nodules. The legume plants release nitrogen into the soil, making it available to other plants.
When the legume plants shed their leaves, the organic nitrogen is converted to nitrites and nitrates, further enriching the soil. Additionally, if leguminous plants are ploughed back into the soil, much of the incorporated nitrogen becomes available for other crops.