Light partitioning within intercropping systems is mostly modelled by using the turbid medium analogy. Barillot et al. assess this approach by comparing it with a light-projective model based on 3-D plant mock-ups for contrasting grass–legume canopies (wheat–pea, tall fescue–alfalfa, tall fescue–clover). They find that light partitioning is accurately predicted by the turbid medium approach in most of the canopies studied; however, a more detailed description of the canopy is required for mixtures exhibiting marked vertical stratification and/or inter- or intraspecies overlapping of foliage.
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