Soil forming factors

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Welcome to my presentation

Good Morning

&

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This is Md Rubel Mia speaking…

ID# 12309056

Program: BSAg

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Topic Name is:

Soil Forming Factors (Organisms)

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Soil forming factors:

The primarily responsible for the development of soil is called soil-

forming factors.

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Topography

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Organisms:Both plant and animal, play an important role in the development and composition of soil is called organism.Organisms add organic matter, aid decomposition, weathering and nutrient cycling.

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Type of organism

Living organism including plants, microbes, soil animals and humans are collectively

reffered to as biota.

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Effects:Soil development is affected by both the type and number of organisms that live in and on the soil.

Plants influence the amount of organic matter buildup in the soil.

For example, soil developed under grassland vegetation has organic matter incorporated into the rooting zone, while in forest soils organic matter accumulates on the surface.

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Grassland soil Pine forest soil Oak forest soil

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This is a picture of an Amoeba trying to engulf a fungal spore

The long rods in this picture are Bacteria that live in the

soil.

This is a Ciliate, a beneficial soil organism.

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This is a close-up picture of an Ant.

This isn't an ant, but a wood-eating Termite.

This multi-legged insect is a Centipede.

This insect has even more legs than a centipede, and is called

a Millipede.

This is a picture of a small worm called a Flatworm, due

to its shape.

This is a common Earthworm.

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Do you have any question ?

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THANKS TO ALL

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