Study on the application of fertilizers N, P, and K to the cuttings of Populus popularis Hsu (1-0)

abonos npk application rates azote bouture cost benefit analysis crecimiento croissance cuttings dose d'application engrais npk esquejes fosforo growth leaf area nitrogen npk fertilizers nutrition des plantes phosphore phosphorus plant nutrition populus potasio potassium superficie foliar surface foliaire