where I0 is the light intensity above the crop, k the extinction coefficient,
and LAIn the leaf area (m2) per ground floor (m2). The model
calculated light intensity, and the resulting absorption and photosynthesis,
using a 5-point Gaussian distribution for the different
leaf layers, which were then integrated at crop level. Calculations
were performed for diffuse light.
The extinction coefficient for the crop (kcrop) was calculated as: