Explain nitrogen cycle with with well lable diagram
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1) Nitrogen is another important chemical on Earth and is present in all the living organisms , in the form of protein , amino acids and nucleic acids .
2) In atmosphere it exists in the molecular form ( N² ) and in the form of some oxides in the atmosphere . But aerial nitrogen , the most abundant component of air ( i.e., 78 percent ) is chemically inert and cannot be used in its pure form by the majority of organisms .
3) During the lightning , nitrogen of atmosphere reacts with oxygen to form dilute nitric acid . This acid comes down to Earth with rainwater . Nitrates are absorbed by plants into their system and utilized for making organic matter ( proteins ) , etc .
4) When animal consume plant matter , they break down the plant's nitrogenous compounds and use them to form new animal proteins and other cell components .
BIOLOGICAL NITROGEN FIXATION
Nitrogen fixation ( Conversion of atmospheric nitrogen gas into N² - compounds )
1) Rhizobium ( in root nodules of leguminous plants )
2) Azotobacter ( in soil )
3) Blue Green Algae
Ammonification ( conversion of nitrogen containing proteins of dead plants and animals into ammonia )
1) Putrefying bacteria
2) Fungi
Nitrification (Conversion of ammonia into nitrates and then into nitrates )
Convert ammonia into nitrates ( NO-2 )
Convert nitrates into nitrates ( NO-3 )
1) Nitrosomonas Bacteria
2) Nitrobacter Bacteria
Denitrifying ( Conversion of nitrates salts into free nitrogen gas )
1) Pseudomonas
2) In atmosphere it exists in the molecular form ( N² ) and in the form of some oxides in the atmosphere . But aerial nitrogen , the most abundant component of air ( i.e., 78 percent ) is chemically inert and cannot be used in its pure form by the majority of organisms .
3) During the lightning , nitrogen of atmosphere reacts with oxygen to form dilute nitric acid . This acid comes down to Earth with rainwater . Nitrates are absorbed by plants into their system and utilized for making organic matter ( proteins ) , etc .
4) When animal consume plant matter , they break down the plant's nitrogenous compounds and use them to form new animal proteins and other cell components .
BIOLOGICAL NITROGEN FIXATION
Nitrogen fixation ( Conversion of atmospheric nitrogen gas into N² - compounds )
1) Rhizobium ( in root nodules of leguminous plants )
2) Azotobacter ( in soil )
3) Blue Green Algae
Ammonification ( conversion of nitrogen containing proteins of dead plants and animals into ammonia )
1) Putrefying bacteria
2) Fungi
Nitrification (Conversion of ammonia into nitrates and then into nitrates )
Convert ammonia into nitrates ( NO-2 )
Convert nitrates into nitrates ( NO-3 )
1) Nitrosomonas Bacteria
2) Nitrobacter Bacteria
Denitrifying ( Conversion of nitrates salts into free nitrogen gas )
1) Pseudomonas
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