Soil color
Soil color can be determined more easily by our eyes. We can
recognize important factors of soil environment by using soil color as an
indicator.
Soil color
is also affected by different factors.
(1) Parent
material
Chemical The composition of parent material influences the color of the soil.
Ex: When the parent material consists of relatively more sand particles or it has a light
color, it forms light color soil.
(2) Organic
matter
The amount and state of organic matter also affect soil color.
Before decomposition of organic matter, it shows brown color. After
decomposition, the organic matter becomes hums, it shows black color.
(3)The nature and abundance of iron
Iron
oxide in the soil is affected by soil color.
Iron oxide in the soil is influenced by the amount of moisture and air in the soil.
Ex: When the soil has average moisture and air, the soil consists of yellow color iron oxide
therefore soil shows a yellow color.
When soil is well drained or under dry
conditions, the soil consists of red color oxides, therefore soil shows red color.
When soil is lack of air by logging of
water, the soil consists of grey or blushing grey color oxides, therefore, soil shows A grey color or blushing color.
(4) Moisture content/drainage
Soil color also depends on moisture content
in the soil. Well, drained soil shows bright and uniform colors.
Poorly
drained soil shows grey colors.
Significance of soil color
Agriculture: the white color of soil has less fertility Unmottled
soil subsoils have good aeration
Constructions:
Grey color soil is poorly drained therefore these soil are not suitable for buildings.
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