Efecto del volumen radicular y la tasa de fertilización sobre el comportamiento en terreno de plantas de pino oregón ( Pseudotsuga menziesii (Mirb.) Franco) producidas con el método 1+1 Effects of preplanting root volume and fertilization rate on field performance of 1+1 Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings

Nursery Technology Cooperative, Oregon State University, Corvallis, OR, 97331-5752, Estados Unidos.E-mail:diane.haase@oregonstate.edu.; robin.rose@oregonstate.edu.SUMMARYTo determine the combined effects of the preplanting root volume and fertilization rate on seedling field performan-ce, Douglas-fir 1+1 seedlings, grown using standard practices at the Weyerhaeuser Aurora nursery (Oregon, USA),were sorted into four root-volume categories (8–13, 14–17, 18–22, and 23–35 cm