No special substances; for the soil aeration are important: soil density, soil porosity, dimensional distribution of pores, granulation, humidity, the presence of the worm Lumbricus terrestris.
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Pollutant
The most common gas in soil air is nitrogen, accounting for around 78% of the air in soil. Oxygen, carbon dioxide, and traces of other gases like argon and methane are also present in soil air.
A substance that pollutes the air, water, or soil is called a pollutant. Pollutants can come from various sources such as industrial activities, vehicle emissions, and agricultural run-off.
they get humus, all of the soil will die.
If there is no air in the soil, the organic matter in the soil will begin to rot. It is called anerobic decomposition. Air in the soil allows for drainage, gives roots a place to grow, and keeps methane from building up by allowing it a ready escape.
The specific heat of a substance is the amount of heat energy it takes to raise the temperature of the substance 1o C. A substance with a high specific heat requires more heat to increase in temperature than a substance with a low specific heat.Air has a specific heat of about 1.005 Kj/Kg/degree C.Most soils are mostly composed of mineral particles, air and water. The specific heat of dry soil is about 0.80 Kj/kg/degree C. However, since the specific heat of water is very high (4.2 Kj/kg/degree C), soils often have a higher specific heat than air, and heat up more slowly than the air.So it ultimately depends on the amount of moisture in the soil. A bone-dry soil can heat up quicker than air, but a wet soil will take longer to heat up than the air.
Mixture "Heterogeneous"
No, soil is not a solution. It is a mixture.
A pollutant fits that description.
The main pure substance in soil is mineral matter, which includes minerals like clay, silt, and sand. These mineral particles make up the solid components of soil. Organic matter, water, and air also contribute to the composition of soil.
Yes, soil contains pores filled with air which is essential for plant roots to respire. This allows roots to take in oxygen, release carbon dioxide, and absorb nutrients from the soil. Adequate air in the soil also helps maintain microbial activity and prevent waterlogging.