Where Does Soil Come From?


12 Answers

vijanti dhanji Profile
vijanti dhanji answered
Soil is the name given to worm out rock particles of different sizes which are mixed with decaying and plant or animal matter. Generally, the layers of materials found above the solid rocks of the earth are soil. This soil covers the land as an almost continuous blanket. The top few centimeters of soil which are occupied by plant roots and other living things is called topsoil. This layer is dark in color, because it contains most of the humus found in the soil.

Humus, as we have already learnt, is the black or brown organic part of soil which is formed by the decay of animal and plant matter. Humans also contain chemical substances which most plants need. Below the region of dark topsoil is a region of lighter soil known as subsoil. The subsoil is made up of large soil particles and stones. A layer of rock lies below the subsoil.There are some useful protozoa that help to make soil more fertile by increasing the nitrate content of the soil. Still other protozoa make the soil less fertile by destroying the nitrogen-fixing bacteria in the soil.
Anonymous Profile
Anonymous answered
The soil comes from the weathering of rocks,it is also from roots of trees and plants
Sudipa Sarkar Profile
Sudipa Sarkar answered
The loose and powdery articles in earth in which plants grow is called soil. It is made up of very small pieces of rock were once parts of larger rocks. Water with chemicals in it will dissolve and wear away some kinds of rocks. Changes in temperature often help break rocks into small pieces. The heating and cooling of rocks may cause cracks to appear. Water gets into cracks, freezes and cracks the rocks even more. Even plant roots may cause rocks to break. Sometimes the seeds of trees fall into cracks in rocks, the seeds sprout, and as the roots of the plants grow, they help split the rock. Wind also helps crumble rocks by hurling sand against the rocks.

But this is the only beginning of soil making. To make real soil, the sand or fine particles of rock must have "humus" added to it. Humus is an organic material that comes from plants and animal bodies. The bodies of almost all dead land plants and animals become a part of soil, through the work of bacteria.

Bacteria cause the plants and animals to decay and make the soil fertile. Earthworms and many kinds of insects help to make the soil rich. The richest layer of soil is at the top and is called "topsoil". This has much humus in it. The next layer, which is called "subsoil", contains mostly bits of rock. The layer beneath is bedrock, which is under the soil everywhere.
Anonymous Profile
Anonymous answered
Soil doesn't just appear out of nowhere. A magician doesn't wave a magic wand and...poof!... Soil shows up. And it's not made in a soil factory. Soil comes from broken up pieces of rock and dead leaves, tree limbs, and dead bugs-those kinds of things.
Anonymous Profile
Anonymous answered
Soil forms from deceying and organic matter or when plants go in to rocks and brake them a part
Lily James Profile
Lily James answered

Soil is basically a naturally occurring object. It is a loose and unconsolidated covering of broken rock particles. It also includes decaying organic matter. Soil is a substance from which our planet earth takes it name.

Soil is capable of supporting life on earth. The particles of soil pack together in a loose way. This gives rise to a soil structure that is filled with pore spores. These pores consist of soil solution and air.

Soil color is the result of chemical and biological weathering. It is used in agriculture. The moister the soil, the fertile it will be. It is also used in mining and construction industry.
Anonymous Profile
Anonymous answered
Worms eat each other
Glen Thornbury Profile
Glen Thornbury answered
Their are many things among those are wind, rain, plate shifting, earthquakes, volcano's, heat and cold, animal wast, decaying mater, ants, worms, waves, and tides. Their are more!
liz Profile
liz answered
As animals dig through the soil, they break it up, permitting more are and water to enter. .../Q: [How soil is formed] 

earthworms help break apart soil

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