Work out leaf area index instantly with clear inputs, formula shown and shareable results.
Divides leaf area by ground area for the leaf area index, then applies the Beer-Lambert canopy law to estimate light interception.
Leaf area index and light
LAI = leaf area / ground area; fraction intercepted = 1 - e^(-k x LAI), with k about 0.5 for horizontal leaves
Typically 3 to 6 at full canopy, above which extra leaves are shaded and add little production.
Canopy architecture: erect leaves give a low coefficient near 0.3, horizontal leaves nearer 0.8.