Estimate equation of gas diffusion coefficient of forest soils in Japan

Abstract

To verify the adaptability of the estimate equation for soil gas diffusivity, we measured the gas diffusion coefficient of intact soil samples at 42 forest sites. Our results suggest that the estimation for Black Soil tends to be evaluated as lower than those of Brown Forest Soil. We propose that modified WLR Marshall Equation and modified Jin and Jury Equation are the best choice for the Japanese Black Soil and Brown Forest Soil, respectively.