Evaluation of easily measured stand inventory parameters as predictors of PAR transmittance for use in poplar silvopastoral management

▶ DIFN transmitted in the gap between trees is inversely related to canopy closure. ▶ Standard digital cameras can accurately predict DIFN transmitted in the gap between trees. ▶ Stand leaf area cannot be accurately represented by one simple stand parameter alone. ▶ Understorey pasture production is strongly and linearly related to DIFN transmission.