Validation of an efficient visual method for estimating leaf area index in clonal Eucalyptus plantations - Hakamada, Rodrigo Eiji; Giunti Neto, Carmeni; Lemos, Cristiane C. Z. de; Silva, Sérgio R; Otto, Marina Shinkai Gentil; Hall, Kevin B; Stape, José Luiz (Southern Forests: a Journal of Forest Science, 2016)