It is also recommended that two leaves should be used for area measurement, and one of them is to be cut from 10% to 100% of solar module’s area and with these reference areas current measurements should be made. Consequently, the obtained area-current graph and equation are used for measurement of other leaf ’s area. In this method, leaf area’s
geometric shape and transparency percentage is no longer important. This method would be more practical in case that
the areas of the same variety leaves are recurrently measured.