Abstract: This paper deals mainly with two aspects. The first is the construction of a unified stocking volume table for four clones of the Aigeiros Poplars. And the second is the necessity of the respective compilation of stocking volume table for the four clones of the Aigeiros Poplars. Although there is little difference among the above mentioned clones with regard to stem form factors, their empirical form factors (f9)are much lower than those of other deciduous trees-the average figure of theformer is 0.34.