Based on the Penman\|Monteith energy conservation, the relation between the ratio of canopy resistance to aerodynamic resistance and the ratio of introduce critical resistance to aerodynamic resistance is established. A simple method for computing crop transpiration under different light densities is attained according to climatological paramenters. The theoretical analysis and example show that the method is valid and applicable in estimating crop transpiration. Daily course of crop transpiration shows tha...
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