translate English to French: The response of 20 open-pollinated tamarack (Larixlaricina (Du Roi) K. Koch) families from five populations to three nitrogen fertilizer levels was investigated in a greenhouse for 20 weeks.
La croissance de 20 demi-fratries de mélèze larcin (Larixlaricina (Du Roi) K. Koch) provenant de cinq populations a été étudiée en serre durant 20 semaines.