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Leaf area index (L) is an important variable characterizing the development of a crop and its exchanges with the atmosphere. Direct measurements are destructive and tedious. The relations between L and the ground cover (C) can be described analytically by taking account of leaf angle distribution and leaf clumping. Because it is difficult to characterize these two variables, we have studied the...
The leaf area index of a crop is the main driver of dry matter production. We propose to use the differences between leaf and soil reflectance in the red and far-red wavebands, in order to estimate the leaf area index. Reflectance measurements are made with low-cost sensors measuring hemispheric fluxes around 660 and 730 nm. The reflectance normalized difference, empirically related to the leaf area...
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