Non symbiotic nitrogen fixers - nutrient cycles, Biology

Non Symbiotic Nitrogen Fixers - Nutrient Cycles

There are certain groups of free living bacteria both aerobic and anaerobic and blue green algae that fix nitrogen. Aerobic nitrogen fixing bacteria such as Azotobacter and anaerobic form Clostridium are widely distributed in soils as well as in fresh and marine waters. In fact accumulating evidence indicates that many soil and water bacteria are capable of nitrogen fixation and because they occur in abundance the total amount of nitrogen fixed is considerable. The N2 fixed in the soil and root nodules is used by the plants to form numerous nitrogenous compounds mainly proteins which then enter the food chain. Nitrogen is returned to the soil in the form of organic compounds through manure, dead plants, and animals and micro-organism. But most of this nitrogen is insoluble and not immediately available for plant use. The organic nitrogenous compounds have to be changed to inorganic compounds to be used by plants. This is done by two processes - ammonification and nitrification.

Posted Date: 1/19/2013 2:12:18 AM | Location : United States







Related Discussions:- Non symbiotic nitrogen fixers - nutrient cycles, Assignment Help, Ask Question on Non symbiotic nitrogen fixers - nutrient cycles, Get Answer, Expert's Help, Non symbiotic nitrogen fixers - nutrient cycles Discussions

Write discussion on Non symbiotic nitrogen fixers - nutrient cycles
Your posts are moderated
Related Questions
Comparing toxicity and the requirement for dilution in water how different are the ureotelic and the uricotelic excretions? What are some examples of animals that present these res

What is Menu Planning? Any individual who carries the responsibility of providing meals has to take decisions regarding what to serve, how much to serve, how much to spend, whe

Potato type: Potato A: Beginning displacement (ml)= Ending displacement (ml) = Potato B: Beginning displacement (ml)= Ending displacement (ml) = Potato type: Potato A: Beginn

Amiodarone, quinidine, propafenone, and verapamil may increase digoxin levels up to 100 per cent. It is prudent to measure a blood level after 7-14 days (and at least 6 hours after

what is the tubular digestive tract?

Explain the loss of carotenoids In processing fruits and vegetables, loss of carotenoids into cooking or canning water is very slight. However, carotenoids undergo oxidation wh

Flagellates - Parasitic Protozoan Several flagellate protozoa parasitise man and live in the blood stream or tissues of the reticulo-endothelial system. Most significant of th

Describe about Postural Changes in Dynamic Auscultation? a) On sudden assumption of supine position from standing on sitting position or sudden passive elevation of both legs:

What is agamospermy? How is agamospermy dissimilar from parthenogenesis and parthenocarpy? i. How can haploid plants be increased in the laboratory? ii. Name the plant f

Q. What is rigor mortis? Dead bodies are at first limp. Many hours after death, skeletal muscles undergo a partial contraction that fixes the joints. This condition, called rig