Land
degradation
reduces
soil
health,
limiting
crop
yield
and
global
food
security.
Soil
sustainability
is
an
ideal
sustainable
technique
to
enhance
agricultural
productivity
while
reversing
fertility
loss
land
degradation.
Plant
growth-promoting
microorganisms,
which
represent
the
group
of
microbes
present
in
active
zone
root
plant
growth
yield,
may
offer
sustain
health
maintain
ecosystem.
microorganisms
have
potential
provide
integrated
measurement
soil,
a
characteristic
that
cannot
be
reached
through
use
physical/chemical
measurements
and/or
analysis
diversity
higher
organisms.
The
aim
this
chapter
was
summary
how
improve
plant's
ability
acquire
micronutrients.
Microorganisms
are
essential
contributors
cycle
micronutrients
environment.
Solubilizing
or
mobilizing
precipitated
forms
nutrients
one
ways
increase
bioavailability
such
as
copper,
iron,
manganese,
zinc,
boron.
They
different
processes
for
solubilizing
material
nutrients,
organic
acid
secretion,
proton
excretion,
changes
structure,
secretion
chelating
ligands,
siderophore
production.
expression
genes
host
plant,
responsible
transporting
also
enhanced
by
microorganisms.
Additionally,
decrease
presence
antinutritional
elements
grain,
leads
dietary
grains
beneficial
one's
health.
With
the
intensification
of
human
activities,
nitrate
pollutants
in
groundwater
are
receiving
increasing
attention
worldwide.
Especially
arid
Nile
Delta
Egypt,
is
one
most
valuable
water
resources
region.
Identifying
source
with
strong
disturbances
important
to
effective
resource
management.
This
paper
examined
stable
isotopes
(δ15N/δ18O-NO3
and
δ2H/δ18O-H2O)
hydrogeochemical
parameters
shallow
groundwaters
southeast
assess
potential
sources
transformation
processes
under
severe
urban
agricultural
activities.
The
results
revealed
that
were
recharged
by
River.
Meanwhile,
infiltration
irrigation
occurred
west,
while
mixing
deep
east
regions
study
area.
TDS,
SO42−,
NO3−,
Mn2+
concentrations
(n
=
55)
exceeded
WHO
permissible
limit
34.6%,
23.6%,
65.5%,
respectively.
NO3−
ranged
from
0.42
mg/L
652
mg/L,
higher
levels
observed
middle
region
area
where
unconfined
condition
prevailed.
It
extended
eastward
flow
direction.
δ15N-NO3
δ18O-NO3
values
suggested
west
semi-confined
largely
nitrification
soil
organic
nitrogen
(SON)
chemical
fertilizer
(CF).
In
contrast,
wastewater
input
(e.g.,
domestic
sewage
unlined
drains)
prevalent
denitrification
identified
might
be
tightly
coupled
biogeochemical
cycling
manganese.
provides
first
report
on
dynamics
Delta,
which
generated
clues
for
management