Page 6 - COMPOSITION AND PROPERTIES OF AIR

2. NITROGEN:

D
aid
air
contain
s
to
r
• •Dry ai r is is said t o cont ain
y
%
nit
r
his
.
T
78
about
og
en
a bout 78% of nitrogen. This
of
component of air helps plants in
component of air helps plant s in
is
as
g
oces
w
h
t
pr
r
it
o
an
their growth process as it is an
t
heir
s
es s ent ial nut r ient f or plant s .
essential nutrient for plants.
us
• •Plants do not use the nitrogen
e
do
t
nit
P
not
r
ogen
s
lant
he
t
l
he
y
present in the air directly. Certain
pr
dir
ai
ec
C
r
es
er
ent
t
in
.
t
ain
e
er
ia
pr
t
he
of
pes
in
y
es
t
types of bacteria present in the
nt
bact
og
r
nit
s
con
oil
o
int
en
t
er
soil convert nitrogen into
v
ed
be
us
can
t
f
er
ent
ms
ha
t
dif
different forms that can be used
or
f
plant
by
by the plants.
he
t
s
.
,
cons
hen
W
ume
• •When animals consume plants,
s
plant
animals
they obtain nitrogen along with
t hey obt ain nit r ogen al ong w it h
hem
.
om
ient
t
r
f
ot
nut
her
r
s
other nutrients from them.