The oxygen percentage in the soil air is

A. 0.03

B. 20.6

C. 79.0

D. 25.9

Answer: Option B

Solution(By Examveda Team)

Soil gases 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. Oxygen is critical because it allows for respiration for both plant roots and soil organisms. The percentage of oxygen in the soil air is about 20.6.