Question

Write down the importance Of the soil on the earth.

Answer 1

oil is a major component of the Earth's ecosystem. The world's ecosystems are impacted in far-reaching ways by the processes carried out in the soil, from ozone depletion and global warming, to rainforest destruction and water pollution. With respect to Earth's carbon cycle, soil is an important carbon reservoir, and it is potentially one of the most reactive to human disturbance and climate changeAs the planet warms, it has been predicted that soils will add carbon dioxide to the atmosphere due to increased biological activity at higher temperatures, a positive feedback (amplification). This prediction has, however, been questioned on consideration of more recent knowledge on soil carbon turnover.

Soil acts as an engineering medium, a habitat for soil organisms, a recycling system for nutrients and organic wastes, a regulator of water quality, a modifier of atmospheric composition, and a medium for plant growth, making it a critically important provider of ecosystem services. Since soil has a tremendous range of available niches and habitats, it contains most of the Earth's genetic diversity. A gram of soil can contain billions of organisms, belonging to thousands of species, mostly microbial and in the main still unexplored. Soil has a mean prokaryotic density of roughly 108 organisms per gram, whereas the ocean has no more than 107 procaryotic organisms per milliliter (gram) of seawater. Organic carbon held in soil is eventually returned to the atmosphere through the process of respiration carried out by heterotrophic organisms, but a substantial part is retained in the soil in the form of soil organic matter; tillage usually increases the rate of soil respiration, leading to the depletion of soil organic matter. Since plant roots need oxygen, ventilation is an important characteristic of soil. This ventilation can be accomplished via networks of interconnected soil pores, which also absorb and hold rainwater making it readily available for uptake by plants. Since plants require a nearly continuous supply of water, but most regions receive sporadic rainfall, the water-holding capacity of soils is vital for plant survival.

Answer 2

The importance of soil on the earth is: a.) It provides the base for the growth of majority of terrestrial plants which is essential for the sustenance of almost all the living beings on earth. B.) It has an abundance of several mineral resources which is used by human beings.

EXPLANATION:

• The soil is formed by the weathering of the rocks by physical, chemical and biological processes, and it takes thousands of years to form few inches of fine soil.
• The life on earth is not possible without soil because it forms base or  supporting ground for a majority of the terrestrial plants and these plants are the source of food and oxygen for a majority of living organisms.
• It also has water and minerals which is absorbed by the roots of plants and is then made available to us. The soil contains various minerals that are used by human beings. The soil also provides a barrier between sun and groundwater.
• It is because of soil that rays of the sun do not fall on groundwater and it is saved from evaporation, that's how groundwater is available to us for use even if nearby open areas become dry.