What is soil?

Soil make life

• Plants grow
• Plants-feed almost every livingthings (directly&indirectly)

Life makes soil

• Soil dwellers bactteria ,etc
• Soil recycle once-living organism into nutrients &soil
• Organic matter (humus)

"Without soils life would not exist as we know it"


Soils Breathe

• Organism in the soil respire.
• Most of them take in oxygen to do their work.
• They give carbon dioxide off (like us)

Skin of Earth

• skin of earth-soil
• Soil-mixture of air, minerals, water, decaying remainings of life, and coutless living organisms.
• Many different soils
• Soile-alive
• They age, and breathe
• everywhere in our daily life.

"Different soil “recipes” yield different soils, depending on various “ingredients,” soil-forming factors, and time."

• Soil forms when sediment, organic matter, or rock is deposited or exposed (by water wind or ice)
• Soil develop-as the time goes, by climate, soill organisms, & terrain.
• Soil take shape - water moves minerals & elements from one layer to another, as living organisms take out nutrients, new nutrients form.

• Climate-temperature or etc
• Organisms- borrowing animals & enzyme bacteria & fungi.
• Relief- topography -slope
• Parent material- chemical composition of original inweathered rock
• Time- weathering alsp depends on age(older soils are more weathered than a younger one)