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SPECIMEN.
-SPECIMEN A [SANDY SOIL]
-It contains gravel coarse sand fine sand
and limited amount of silt
Characteristics of specimen A
1-it is grey and brownish in colour.
2-its particles are large .
3-it has lower water retention capacity
4-it is not pliable or plastic so it can not
form structure.
5-it has large pore spaces and therefore are
wild aerated
Economic importance of specimen A.
1.easy to work on or plough
upon.
2.easily washed away or leached
3.prevents watere loging 4.easily heat up
5.well aerated 6.has low PH value hence
likely
acidic
7.support growth of water
SPECIMEN B [LOAMY SOIL]
-It contains fair balance of clay silt and sand
particles.
CHARACTERISTICS OF SPECIMEN B.
1.it is dark brownor black in
colour
2.it is not as coarse as sand nor as smooth
as clay
3.it has moderate speed pore
space
4.it contains organic matters or residue
5.the rate of water percolaton is moderate
ECONOMICS IMPORTANCE OF
SPECIMEN B.
1. Moderate water absorbing and holding
capacity
2.it contains organic matter which is source
of
plant nutrients when decomposed
3.easy to work or plough upon
4.does not easily loose its
nutrients through leaching
5.well aerated for root
respiration and development.
6.best soil for crop cultivation
example maize rice cassava okro tomato
and
millet
SPECIMEN C [CLAY SOIL]
The particles are predominated by clay
consisting of
about 60%.
CHARACTERISTICS OF SPECIMEN C
1.it contains small fine poudry
compact particles.
2.it is smooth and velvet
3.the pore space hence not well aerated
4.has low water retention. 5.grey or
brownish in
colour 6.friable
or plastic or easy to
mould
ECONOMIC IMPORTANCE OF
SPECIMEN C
1.difficult to work on or plough
2.poorly aerated
3.easily lodged by water.
4.not easily leached
5.not easily heated
6.supports growth
DIFFERENCE BETWEEN SPECIMEN A
AND C
1.SPECIMEN A has large particles
or coarsed
Texture ----- SPECIMEN C has
small particles or fine Texture
2. SPECIMEN A is well aerated -------
SPECIMEN
C is poorly aerated
3. SPECIMEN A is easy to plough
-------
SPECIMEN C Is difficult to plough
4. SPECIMEN A Forms no
structure ------
SPECIMENC Forms aggregate Or lumps
5. SPECIMEN A is a Warmer Soil ---------
SPECIMEN C is a Cooler Soil
6. SPECIMEN A has poor water
retention ---------
SPECIMEN C has water retention
SPECIMEN D [PEBBLE OR SAND
STONE]
It is a sedimentary rock formed by settling
of
sediments
SETTLING OF SEDIMENTS.
The sediment are deposited in
layers by agents
like flowing water wind and Ice
CHARACTERISTICS OF SPECIMEN D.
1.It Appears in layers
2.It has coarse texture
3.Presence Of Irregular fracture
4.Loosed Binding particles
5.Soft & Easily Breaked When Slight force is
applied. SPECIMEN E [GRANITE]
It is an igneous rock formed by
molten magma.
(SOLIDIFICATION) from beneath
the earth
crust. It is the oldest known rock
CHARACTERISTICS OF SPECIMEN E.
1.SHiny in appearance
2. Light Dark in Colour.
3. Coarsely crystalline in appearance
4.Has firmed binding particles
5. Extremely hard & Required a greater
force
to
break
SPECIMEN F [MARBLE]
It is a metamorphic rock formed
from igneous and sedimentary rock which
as a
result of
subjection to Intensive heat & Pressure
hence
change it's former state by process of
metamorphism, Chalk and Lime stone are
changed to marble
CHARACTERISTICS OF SPECIMEN F
1.Hard and do not break easily.
2.Shiny in appearance 3.Multi Coloured
4.Granular Texture
5.Crystalline Shape
SPECIMEN G [LITMUS PAPER (BLUE AND RED)]
It is a common indicator used to determine
the
acidity or alkalinenity of soil (Soil PH)
CHARACTERISTICS OF SPECIMEN G
1. Blue litmus paper turns red in acid
2.Red litmus paper turns red
alkali
3. Litmus paper turns purple when neutral
SPECIMEN H [DILUTE HYDROCHLORIC
ACID (HCL)]
It is an inorganic acid made of hydrogen
and
chlorin.