Soil Heat Flux Density G

For daily calculations, G (MJ m-2 day-1) can be estimated using a simplified approach to the heat balance of the soil profile:

where T is the mean daily air temperature (°C), T-1 is the mean air temperature (°C) of the preceding three-day period, and 0.1 is an empirical conversion factor (MJ m-2 day-1 °C-1). Because the magnitude of daily soil heat flux beneath densely planted grass is relatively small, it can be neglected (i.e., G = 0).

For monthly time-step calculations, G can be computed from the mean monthly temperatures of the current and preceding months as

Was this article helpful?

0 0
Growing Soilless

Growing Soilless

This is an easy-to-follow, step-by-step guide to growing organic, healthy vegetable, herbs and house plants without soil. Clearly illustrated with black and white line drawings, the book covers every aspect of home hydroponic gardening.

Get My Free Ebook

Post a comment