Long Description of Figure 7:

Diagram showing the many factors that control heat transfer between two soil layers: heat is transferred from soil layer 1 to soil layer 2 by conduction, vapor movement and liquid movement; thermal conductivity and heat capacity also have affect the amount of heat transferred; moisture content affects thermal conductivity and heat capacity; the temperature gradient affects moisture content, thermal conductivity and heat capacity; the vapor flow enhancement factor, the vapor density, the latent heat of vaporization, vapor diffusivity, and hydraulic conductivity all affect the moisture content; the composition of soil layer 2 also affects moisture content.