Choose a representative plant (most luxuriant plant) and on it determine the main stem (best developed stem). The shape of the leaf is the reading of the dissection of the leaves, it will be determined in the leaf located in the middle of the main stem of the evaluated plant and it will be marked with a tape, preferably red, so that this plant can be subsequently characterized in the following phases or stages of growth and development. Another alternative to avoid marking is to characterize every 3 plants from the beginning of the furrow