“…Increases in growth due to urea fertilization have been extensively reported for P. taeda plantations in the USA, at different ages, in a wide variety of soils and with different application forms and doses ( Albaugh et al 1998, Allen and Albaugh 1999, Jokela et al 2000, Nilsson and Allen 2003, Rahman et al 2006, Fox et al 2007). However, in subtropical areas of Northern Argentina and Southern Brazil decreases in growth related with urea fertilization have been observed ( Costa Muniz et al 1975, Faustino et al 2011, Fernández et al 1999, 2000a. The urea depressive effect was observed in different experimental situations, with different doses and placements of fertilizers, i.e., it is not the result of an operational problem like salinity or toxicity.…”