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2. Soil gas - Wikipedia

   en.wikipedia.org/wiki/Soil_gas

   Soil gases (soil atmosphere [1]) are the gases found in the air space between soil components. The spaces between the solid soil particles, if they do not contain water, are filled with air. The primary soil gases are nitrogen, carbon dioxide and oxygen. [2] Oxygen is critical because it allows for respiration of both plant roots and soil ...

3. Pore space in soil - Wikipedia

   en.wikipedia.org/wiki/Pore_space_in_soil

   The pore space of soil contains the liquid and gas phases of soil, i.e., everything but the solid phase that contains mainly minerals of varying sizes as well as organic compounds. In order to understand porosity better a series of equations have been used to express the quantitative interactions between the three phases of soil.

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5. Soil moisture - Wikipedia

   en.wikipedia.org/wiki/Soil_moisture

   The rate at which a soil can absorb water depends on the soil and its other conditions. As a plant grows, its roots remove water from the largest pores (macropores) first. Soon the larger pores hold only air, and the remaining water is found only in the intermediate- and smallest-sized pores . The water in the smallest pores is so strongly held ...

6. Macropore - Wikipedia

   en.wikipedia.org/wiki/Macropore

   Being large pores in soils, macropores allow easy movement of water and air that they provide favourable spaces for plant root growth and habitats for soil organisms. [10] Consequently, these pores, with various residing soil organisms such as earthworms and larvae, also become important locations of soil bio-chemical processes that affect the ...

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