Experimental forest plantations in Costa Rica.
Twenty-five species of native and exotic forest trees were planted in 3 different regions of Costa Rica. Total ht., d.b.h., number of branches and crown width were recorded periodically over 5 yr. Growth differences were observed among the tree species at the 3 sites. The performance of Jacaranda copaia, a native species, compared well with that of Gmelina arborea and Tectona grandis, the best exotic species. From author's summary.