Question

how can you say that air present in soil?

Answer 1

About half of the total mass of soil is made of up vast, interconnecting cavities, or holes. These holes are filled with both air and water. The amount of air and the amount of water filling these spaces varies dramatically throughout the year and from location to location, but averages about 50% each.

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Answer 2

Soil gases are the gases found in the air space between soil components. The primary natural soil gases are nitrogen, carbon dioxide and oxygen. The oxygen is critical because it allows for respiration of both plant roots and soil organisms.The basic components of soil are minerals, organic matter, water and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air. These percentages are only generalizations at best.

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