Abstract
The ability to simulate the static energy budget of the green leaf is needed before any of the dynamic leaf functions such as stomatal control or the interactions among the intermediates of photosynthesis can be studied on the computer. This program uses a windowed interface, interactive control of 23 environmental and structural variables, and a modular design to build such a simulation. The modular design allowed by the newer implementation environments, such as Borland's Turbo Pascal V, means that further dynamic functions which require elements of the static energy budget can be simply added as additional modules.