Final answer:
The limit of the soil to air area distance in soil away from the interface can vary depending on the ecosystem.
Step-by-step explanation:
The limit of the soil to air area distance in soil away from the interface depends on various factors. Soil is composed of inorganic mineral matter, organic matter, water, and air.
The soil volume is about 40 to 45 percent inorganic mineral matter, 5 percent organic matter, and 50 percent water and air.
The distance over which air influences the soil can vary depending on the specific ecosystem, but changes in soil moisture content, vapor pressure deficit, and treefall gaps can extend about 50 meters into the forest in tropical environments.