Leaf area measurement is almost an essential aspect in agricultural and biological studies in order to observe the growth and development of plants. Leaf area measurement
methods are classified as paper weighing, grid counting,regression equation [1], width and height correlation model[2, 3] estimation of leaf area by regression analysis of leaf area versus length and width [4, 5], and measuring the leaf ’s area that is copied onto a paper by a planimeter [6, 7].Grid counting method is simple in principle and has a high accuracy; on the other hand it takes time to measure the exact leaf area. The paper-weighing, the so-called gravimetric method is built on the paper weight that is cut exactly in the form of the leaf by tracing the contour and then compared to the dry weight of leaves using predetermined leaf-areato-dry-weight ratios, provides a precise measurement of the leaf area, but in fact it is an inconvenient procedure and not applicable to a large number of leaves