soil temperature


SOIL
ATMOSPHERE


SOIL

WATER


SOIL

pH


SOIL

TEMPERATURE


INTERACTION

BETWEEN

ENVIRONMENTAL


FAC
T
ORS



Gas

in the soil

comes from

the outside
air

and

the

activity of

microbial


>
N2,

the

N

fixation

by microbes,

soil

N

cycle

processes

>
O2, the result of

photosynthesis

>
CO2, the result of

microbial

respiration


The pores

in the soil

mineral

or

organic

content
of

the

gas

and

water


Gas content

in the soil

determine the

type

of microbes:

> aerobic
microbial

>
anaerobic

microbial

>
facultative

microb
ial



Ground water

is essential

to

the life of

the soil

biot
a

G
round

water

is determine :

>
soil
humidity

and


>
availability
of water

for

soil

biota:

the solubility

of

minerals

for

plant

and microbe
’
s
nutrients

is high



Soil pH plays an important role in
avaibility

of
soil
nutrient to soil

microorganism


S
oil pH
acts
on the action of the enzyme that
produced
of
the soil microbial


On acid soils, nutrients are less available to soil biota


On neutral soils, sufficient

available nutrients for the
soil biota



Soil

temperature

influence :


> the

reaction

physiology

of biota

cell


> physico
-
chemical characteristics of

the environment
example:



soil

volume,

pressure,

oxidation
-
reduction
potential,

diffusion, viscosity,
structure,

groundwater,

surface

pressure



High

temperature, protein

denaturation

and

microbial
cell

wall

denaturation


Low

temperatures,

microbial activity

stopped





Interaction

Between Environment Factor

Ekpo,

M
.

A
.
,

et

al
.

2008
.

RATE

OF

BIODEGRADATION


OF

CRUDE

OIL

BY

MICROORGANISMS


ISOLATED

FROM

OIL

SLUDGE


ENVIRONMENT
.


African

Journal

of


Biotechnology

,

7

(
24
)
:

4495
-
4499
.


Kumar,

N
.
,

et

al
.

2010
.

ISOLATION

AND

SCREENING


OF


SOIL

ACTINOMYCETES

AS

SOURCE

OF


ANTIBIOTICS

ACTIVE

AGAINST

BACTERIA
.


International

Journal

of

Microbiology

Research,


2
(
2
)
:

12

-
16
.