the main difference bw symbiotic and non symbiotic nitrogen fixation is that the symbiotic fixation is a function of nitrogen fixing bacteria that live in permanent relationships with the host plants.
the non symbiotic nitrogen fixation is a function of free living bacteria in the soil
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Relationships that are loose in between the nitrogen-fixing bacteria and the plants are called as associative relationships and thenitrogen-fixing is called asnon-symbiotic nitrogen fixation. It occurs in rice roots. In non-symbiotic nitrogen fixation, the bacteria do not require a host plant
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The main difference between symbiotic and non symbiotic nitrogen fixation is that the symbiotic nitrogen fixation is a function of nitrogen-fixing bacteria that live in symbiotic relationships with the host pants whereas the non symbiotic nitrogen fixation is a function of free-living bacteria in the soil.
Over the years, chemical fertilizers have helped farmers increase crop production to meet the increasing demand. However, the overuse of these fertilizers is harmful because they cause air and water pollution; and also deplete minerals from the soil. Therefore, there is a need to now switch to organic farming which involves the use of ‘Biofertilizers’. Let’s learn more about biofertilizers and some of their types.
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Symbiotic nitrogen fixation usually occurs in plants that carry nitrogen-fixing bacteria within their tissues. The best example is Rhizobium bacteria and leguminous plants. They both can survive independently, but it is beneficial to both if they are together as they nitrogen fixation takes place.
Relationships that are loose in between the nitrogen-fixing bacteria and the plants are called as associative relationships and the nitrogen-fixing is called as non-symbiotic nitrogen fixation. It occurs in rice roots. In non-symbiotic nitrogen fixation, the bacteria do not require a host plant. The free-living aerobic and anaerobic bacteria in the soil fix the atmospheric nitrogen and increase the nitrogen content of the soil.
Still others do so on their own. eg. Azotobacter spp are free living nitrogen fixers.
we cannot exactly call disease causing bacteria non-symbiotic because any type of relation is symbiosis. Then it can be classified as antagonistic, commensalism, amensalism and so on. Symbiosis is a broad term and usually refers to a relationship between two living systems , positive or negative , dual or singular.
So as I mentioned u may use both terms considering a common property.