Question

How is soil formed? how many year to form soil?​

Answer 1

Answer:

Hola‼............❤✌

Soil consists of a mix of organic material and broken bits of rocks and minerals. This is termed the ‘parent material’- The parent material is the minerals and rocks that are slowly disintegrating to form the soil.

Soil is formed over a long period of time by a number of factors. Soil formation is a long slow process. It's estimated that an inch of soil takes 500 to 1000 years to form.

At Stage One ,This is the rock pulverizing stage. Here the forces of wind, rain, freezing and thawing water, earthquakes, volcanos all work to slowly pulverize rocks into smaller partcles that can make up a soil.

At Stage Two ,This is the early stage of what we might call soil. Here we add some life, specifically lichens.

At stage three, at this time the little pockets of soil have formed to the extent that some larger.

Plants, plants with roots can have a got at growing.

& Final stage, the soils are developed enough to support thick vegetation.

For ur second question, it may be 200-400 years or 500- 1000 years.

Hope it’s helpful....... ☺

Answer 2

Answer:

Soil is a mixture of small particles of rocks and humus (i.e, organic matter obtained from  decaying of living organisms or their wastes). Temperature variations due to radiations of  the sun, rain water, winds and living organisms influence the formation of soil from the  rocks involving two processes: weathering and paedogenesis.

Breakdown of bigger rocks into small, fine soil particles is called weathering. It may occur  due to physical, chemical or biological means. Under the influence of solar radiations, rocks  heat up and expand. At night, these rocks cool down and contract. Since all the parts of rocks  do not expand and contract at the same rate, cracks appear in the rocks and ultimately the  large rocks breakdown into smaller pieces. Flow of water through or over the rocks make  the cracks bigger. Flowing/falling water also has a erasing effect on the rocks. On freezing  the water expands in rock crevices and break the rocks. Similarly, strong winds continue  to rub against hard rocks and erode them. Growth of lichens, mosses and other plants also  influence the formation of soil by eroding the rocks over which they are growing.

Explanation: